Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a11cd58c7cb3fe…

MALICIOUS

PDF

80.6 KB Created: 2021-08-27 22:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3e1bb574f3da0f7a52997a8615d995a6 SHA-1: 2d4bb28dd76f53628096343cb23e11c7a1a9835c SHA-256: 80a11cd58c7cb3fed06781d85a842c97fa91bddbe59e289124599344caf81f87
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting and link farming, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • 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
  • 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://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a440f583b85---xesenuda.pdf In PDF document text
    • http://allasclub.com/campannas/file/xuzufunad.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/3na44okslk1e560vm1naav7q6p/fejexoxupikigatolimopuwu.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/dokijotomaje.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/0cfqfd1b2s4eqgaot2se0rclqc/dogetogirazogowalala.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609420519bae1---tageza.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/vibifivizamupumi.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/d4c94d2lecrrpvrdcts5s1jtif/gunisupevigaxal.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/97609030331.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/zemuwudesutaruwilom.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/mobox.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f085bcd2738---76110274982.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/zizifagezi.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/simunuwitufovuluvebibaniv.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/12263872691.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/mefivumavibobe.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/xopaferoweguzexi.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ac24debe0---75023964518.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e23be229c---6148788387.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/vovupeki.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/fefanuxikotupovos.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/xomifiliramufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=abrasive+wheel+test+questions+and+answersPDF 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_off0000d2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FF 18768 bytes
SHA-256: 1130e7098f0523e35e42f24282f5b55b1d5086c709d50536b4d4f1d183d36419
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 10864 bytes
SHA-256: 57bb7b506915cd76f38d2cf2e65fa2a9485a66b12f24ccfc058afaefb431b96a
font_02_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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