Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27cd2ce2d719209…

MALICIOUS

PDF

92.4 KB Created: 2021-07-01 19:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d38bac9acbb2d9f6c7355ce57211fd4e SHA-1: 7e473d5e9391ec813c74932c6badd3bb5890f387 SHA-256: c27cd2ce2d719209f248f37065d01f93b737910a8350b8c08e6452d7c5fea6f5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories, suggesting a link farm designed to trick users into downloading a payload. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing and trojan activity. While no scripts were directly extracted, the PDF structure and URI heuristics point towards a malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bogelaipigeon.com/upload/file/29298142535.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a28cb1ddf8---52499192688.pdfIn PDF document text
    • https://triosms.com/userfiles/file/bafizoroguxiwufixupobux.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/niguwudojezexa.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/0d64849809bb2a819e0538fa7593d9b1/lopudizudejopagidev.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/524bd9bce5a44ad78263841fb555dbdd/27885883812.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/dopv2dg0dc82e3a60o25lmbi5g/niraxabejejovuso.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c27da000c---51762406892.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d49c84c9510---juzelojoletulosobevalib.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f2c4b093d---96173662820.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070006c3b27f---juzanowugavow.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d33e409132---51524663164.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/66905023544.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/907644218d1ef505aeb69f604713987d/66068575084.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/nopuxumubejuzofexut.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/88e89cf0f6e4697d181d7fb312a50291/21192213126.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa0936fdc8---tavubawute.pdfPDF link annotation
    • http://akvatoria.by/UserFiles/files/69439154100.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3573125384---96866974997.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081f1216b90e---71978410270.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/50655171401.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c8ae4b6b6298d2180fc73135a79e5687/67003700751.pdfIn PDF document text
    • http://pinetreerealty.ca/clients/55933/File/rukepitariti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=story+templates+freePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 17884 bytes
SHA-256: dd72ea11f635bf37e287e174c82590123dca4934de392bcf7e3c503a1ccbc620
font_01_sfnt_off00013476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8D 10512 bytes
SHA-256: 6aece65c4504efc9b68061dd8566569d8a2ecea53f9d39a6934d123d6706e8cc

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