Malicious PDF — malware analysis report

Static analysis result for SHA-256 9980b91758db7492…

MALICIOUS

PDF

82.6 KB Created: 2021-08-26 07:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5e9f953dc7f4c175f76d2b0ad88dd3e SHA-1: 9486276a9e2518fd6f66b85d0ced72dd6b89135c SHA-256: 9980b91758db749294fa2d7b4a9be6471cf386ca31337222da4cdc38aa0f8873
172 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting. The presence of urgency lures and download buttons suggests an attempt to trick the user into clicking these links, which could lead to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cbgnfinance.com/userfiles/file/98791114625.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/d8b5fb8854929b74825c3fde3e2a1141/runetunezededegatipuradu.pdf
    • https://cicadit.ro/UserFiles/file/36335766663.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5eba57c997---72875607496.pdf
    • http://termocity.by/pics/files/pasukuf.pdf
    • http://kimdaiphatsteel.com/Images_upload/files/vevabetajanopesisuzawib.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/vewebexisedok.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d86ae23d0---69539872110.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e6abe140b---3814165916.pdf
    • http://cisseo.net/userfiles/files/piwejizetilevilat.pdf
    • http://fabtur.ru/upload/files/76286197537.pdf
    • http://tubietelbar.hu/uploadfile/49194927431.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bd519b63d---97889192966.pdf
    • https://reclamesticker.nl/images/uploads/file/
    • http://jhdljz.com/userfiles/file/1627269972.pdf
    • http://pro-group.ru/userfiles/file/75778104801.pdf
    • http://iburgisidimarsala.eu/userfiles/files/jugaguwukepuduweti.pdf
    • http://materialdeestudo.top/userfiles/files/70718376786.pdf
    • http://regmac.net/userfiles/files/naranunivabekupaxaborumi.pdf
    • https://okud-istra.hr/userfiles/file/nedugeban.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160970f8613953---lokaxufofo.pdf
    • http://alphanaturehk.com/userfiles/file/7080997644.pdf
    • http://villalapinetafavignana.it/userfiles/files/37004466266.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b33f19354f6---gibedofiluz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=insta+story+saver+free+download
    • 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_off0000deba.bin
a8011a2418c4bd6a733d2efef2db1c2de537ebef43cf3d683afd81e779d6b283
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 17468 bytes
font_01_sfnt_off00010ccc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 16792 bytes
font_02_sfnt_off000124e3.bin
eb76323666d87a3c78e471f66ad3f425a583faad8a802c56decb94a5f026b703
pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 10472 bytes