Malicious PDF — malware analysis report

Static analysis result for SHA-256 2970d8b9c306bbed…

MALICIOUS

PDF

84.4 KB Created: 2021-06-28 01:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eae394cea55307959f26ab9092a01d8d SHA-1: 85d3019b61ae9ef6909f6dc3d7bfb2cfa107e00a SHA-256: 2970d8b9c306bbed9acba133aef45388c7b76518f56169ad7df93ab029e781ea
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous links to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure itself does not contain executable scripts, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/628352a2801c1b275e04a5a5dd706050/bedawozupok.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867da5d2928---mapazajoz.pdf
    • http://jshtextile.com/UserFiles/file///nikaxolenol.pdf
    • http://vidol.nl/userfiles/file/biwitisawolalupekaguwi.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/tai5ono8egegocfrcr6agr9ujf/dotena.pdf
    • http://mywayrtk.info/userfiles/file/99550493165.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f955fcef4b---gewenopigerijagup.pdf
    • https://bestofbucerias.com/upload/file/mokasifinigijesaruduzid.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd9d784f88---fopadixovubukimu.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085747e6d208---budoxubuvasadelonafareni.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/lnqd8gok3rfl0colsts1klqnk3/71450770490.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160904ab5d994f---gesejotuvutipe.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/bae1b4116c1727eb98d70a309db3a39e/nexusifonukifizur.pdf
    • http://skupka54.ru/upload/m/tuvibufob.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/zakujepetasasufepenukuja.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/6a8fb91832bec8afcf00bc08f4f35d61/lasezulegafegalanofi.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/281f624c7afbd29e231deddef348bbf7/36176802388.pdf
    • https://toskov-yordanov.com/userfiles/file/pebiburerisuxodefajij.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/5b5a7742ec4018972c5e0ae185a9244a/kefakosutoxis.pdf
    • https://mides.vn/images/ckeditor/files/lemobatibet.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c892bde468---24338502401.pdf
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/nopod.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160791ad2ef938---bebagetefajezupuw.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c159a14a754---23330737184.pdf
    • http://www.contectrade.hu/fckfiles/file/katagubideketoted.pdf
    • https://aznamaste.com/ckfinder/userfiles/files/mixuzitu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=computer+programming+dictionary+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 16792 bytes
font_01_sfnt_off0000faf5.bin
4b379945a88800e042139c41ce33673caf208f43f888da0fbae1bff64dfbbc5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 10996 bytes
font_02_sfnt_off00011455.bin
3e8c1d256253c9ccb4f950e463a4eb4cfe4c7c527e590dedea5122991c83a176
pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 18332 bytes