Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e5280d1d2e05e7…

MALICIOUS

PDF

85.6 KB Created: 2021-08-26 03:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42cc943175087b0339bc4cb01e35ae50 SHA-1: 379d1f8c8b079d2f02eb5dbb293a6ec2eabfac40 SHA-256: 38e5280d1d2e05e780114b1baa0e66a8d20a15163d4f851c526a9f526cb3a762
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a lure to enable macros or editing, which is a common tactic for malware droppers. Numerous URLs were extracted, many pointing to potentially compromised or disposable hosting, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://outspokenholland.com/userfiles/fckFile/20210708165905.pdf
    • http://kaizenlife.com/ckfinder/userfiles/files/nikimosuzap.pdf
    • http://botosani.ro/img/uploads/file/fusorewilikolipojo.pdf
    • https://sokolzgierz.pl/web/uploads/files/53786695741.pdf
    • http://transchem-tech.com/Uploadfiles/files/70146380292.pdf
    • http://mikailang.net/userfiles/file/20210801110542_904966343.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a0be0f70fcc69f797a6463a3e28f0154/wegiwabiluxaje.pdf
    • https://sunrise-photon.com/upfiles/editor/files/nipebavesigumape.pdf
    • http://capesociety.ca/uploads/files/bixovekibikodunosefi.pdf
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/vagigajanolojevosolifotos.pdf
    • https://soudurelauziere.ca/upload/editor/file/13963942873.pdf
    • https://actor-conseil.com/files/file/60327158327.pdf
    • https://cakenepal.com/userfiles/file/vezilulirezoloxojojotiji.pdf
    • http://shesob.com/file/files/lilofofutalefuxetal.pdf
    • http://www.miyadenthai.com/image/upload/File/98743331043.pdf
    • http://canoeing.by/pics/files/kofuzezos.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3a8fc40a7---pukinorakef.pdf
    • http://ohappy.org/userData/board/file/sijamelofukuwaxubamu.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/80ea7c42cf8eb0b891f4dce40200c654/56601635303.pdf
    • https://1877painters.com/FCKeditor/file/nugavinulaz.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6d5adc206---juxanufozefodatobigavix.pdf
    • http://viettranslators.com/webroot/img/files/lojivafusipevevewe.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b0f468aaa6c0a74372484ac9f225472b/75488173084.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=meal+planner+spreadsheet+template
    • 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_off0000ebfa.bin
903505882fc3b4e6892c2e85d462fe60201a2fbaa200f6130a5f942fb3c48a9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10440 bytes
font_01_sfnt_off00010373.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 16792 bytes
font_02_sfnt_off00011b85.bin
3556e05def0961521694743183ec33ceaa746e1aeeb71ec2f8ccd9a84282cd97
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B85 17472 bytes