Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78f34cb7890fdad…

MALICIOUS

PDF

79.9 KB Created: 2021-09-06 11:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1592027ae3bafa8de35b4d5825ab4af SHA-1: a933491eabbc9b415a9917451d18cd1f13e720fe SHA-256: e78f34cb7890fdad72a938748c6547ff17b0eb3bf2ab49d023cf1deb71ddae14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://wallsfamilyreunion.com/clients/876683/File/ximuselagapofarejiwor.pdf In PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081397fdf2c8---vosujuwulanofelitid.pdfIn PDF document text
    • http://stefani.cz/fck/file/likemozibodinukowevugumi.pdfIn PDF document text
    • https://terracell.info/images/file/jujadixegegenenategisaso.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/pexejuzelaxebudu.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/89803952879.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/33006713636.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/zanenosaginotaxowatiwasib.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092950310f7f---6088188574.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b4fed65ca---pagegi.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xawubidudeno.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/tamosuwapudijixu.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/figegajidosewitesitawol.pdfIn PDF document text
    • https://tl-systems.hu/files/files/78420856029.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c1d66e23e3505eddf0f78719fb674ce3/xigudadideduvumewanopiw.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/biwizipozew.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/3rm54j6q0o9l38u4dt4d1h4h13/51979318612.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c36005a3ed5---15591056638.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/kovobakupu.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/67731857132.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/eba0ac0984b539f46b1dc34e90ee7f33/padepepuxuponokorazenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=principais+zoonoses+no+brasil+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 10716 bytes
SHA-256: 0a05377b9344280ca88e7b6d336e1cd5de04b3a5b10b7722d7323fdfe8ad3207
font_01_sfnt_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 18948 bytes
SHA-256: 55baa225c8c08b87b3623243f496b98393ba1d730b8f809b9cf8a85ff47a23b9
font_02_sfnt_off00011a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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