Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf1fee0aa167f2b…

MALICIOUS

PDF

107.2 KB Created: 2021-07-17 15:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0ab94fcc7079614793126d410779d7a6 SHA-1: d07581fd9bcc9e41d39ecdd588b9a3c93e489e52 SHA-256: 7cf1fee0aa167f2b7a1da6ab7ebcd3dbeaf1a26b25a96fa0fae236bd282af69a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are structured as link farms on disposable hosting, indicating an attempt to redirect users to malicious content. The PDF structure and the presence of multiple external links suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://armagedonspedycja.pl/files/file/30147465182.pdf In PDF document text
    • http://cbcom.eu/ressource/site-image/files/kanaripapekizufuneza.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/18511789989.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/7sge7t1clgmkppvibndap0d7cr/navuvojezoruwudakapiduda.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1bfc650ca0---megin.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/234d55d37d918679a516627f53780b22/robazekowekupu.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/37900255944.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/b6jao2g7mjg4bdr89bqsk173u0/70733321056.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/g00runhq39k3l2bi9o57ji23ll/pawopelo.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bab3c438dec---58005485655.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/jejiwuzu.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/felitogitojikim.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077b64495e8c---dolexejaturafasupij.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4128bbf499---13433455249.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/9bb0r50lr9k1etia1jes1oefe7/66011919180.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/51637964797.pdfIn PDF document text
    • https://focaccellini.it/file/75599511818.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/dfeb229664c916faa8f3dff1c2a07abe/koderuropofokoj.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f6e69ec93---54583972166.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7111801ec3---zofax.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d122bdf988---ripovogaw.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/70ee9c7eab56f6713db6c74d6d7c3638/56204754110.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/10418155828.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094bae7a3fc2---lelaromopuzog.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d94c5c61ef8---17129535902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=berth+meaning+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000153be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x153BE 19452 bytes
SHA-256: edd1913fececc2a583f3563361829cef780034cb0a47a9d20e1b6976d4d4d7b8
font_00_sfnt_off0000f9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9ED 27472 bytes
SHA-256: d4cab6b0f8a5498929f21370c45d87603ea4e22e042eaff9bbd820e812a5756f
font_01_sfnt_off00013c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1B 10488 bytes
SHA-256: 2b450326c47ae32e61367323f5e9cdd85af9609d04de720eedcf3d722987137b
font_03_sfnt_off0001747b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1747B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00018c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C88 4516 bytes
SHA-256: 8542d9b3b4ea717d772e3fe1301dbac40ec4f635f712f60c78088e70b28f54a8

Open this report in the interactive analyzer, or submit your own file for analysis.