Malicious PDF — malware analysis report

Static analysis result for SHA-256 7867ac0555924199…

MALICIOUS

PDF

70.1 KB Created: 2021-06-25 13:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e5ec4041d8a43981467ded5d54006fd SHA-1: a593cc7062d79adc4c044fd07e295bf6f2567170 SHA-256: 7867ac0555924199920cab9147b81f37e9f499245b0c2ff5a1df6fec46ca54a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of multiple links on disposable or compromised hosting further supports a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/744n7n13l1kug80hihhndk9lpc/32318230460.pdf
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/takipoxol.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/c626a3b84d88988de48a0a039ac13409/suwatamurilixadimutusisud.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8e27df985---51926294411.pdf
    • http://fixafilm.se/userfiles/file/56804299615.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17c9a0b08---bisovudaxuxi.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160762a66535fd---69681250370.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/fv8uucsb4of8jp2n9hnlr8tm36/kufodowabazak.pdf
    • https://elesud.it/img_pagine/file/rowowezegugaxomelasekipaz.pdf
    • http://shosholoza.de/file/bipofaseratazoni.pdf
    • http://langfordfinancialservices.com/userfiles/files/lulaxapudiluwefafusalu.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2f84c9b19---ronawewipunafeligizajazal.pdf
    • https://ckd-otto.com/contents//files/duwokubudubasusijilafero.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d77ecb3be---galapilunat.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160946417d1659---20439906298.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/730489c7868829e4db50a46aeb60537b/xegazenopokufaroxireze.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6e963f181231e177b77024d14809ac49/lagesofizujemawemuwijati.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160877b49e9dbf---nadopugikokegotu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=pseudocode+algorithm+questions+and+answers
    • 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_off0000b026.bin
20b689b48f73dacb216ba699ac2addd004994d3f02cc4d5a4d95d601fabf986f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB026 16180 bytes
font_01_sfnt_off0000da10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 16792 bytes
font_02_sfnt_off0000f227.bin
be7a5c6124973dc43eabda7e2b0050812204cf90490effc48714fece12d57e53
pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 11152 bytes