Malicious PDF — malware analysis report

Static analysis result for SHA-256 480cec34499ca07b…

MALICIOUS

PDF

97.2 KB Created: 2021-07-17 11:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6add4fa66fce64637a0b4d0a2380f086 SHA-1: 3110ae73d729fb697ff39eb376debde04050e4d3 SHA-256: 480cec34499ca07b0483526266a985d1a38e75a0989f46a24ecda92e3f48dcc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/57ca2779e9057aa08c6169e7e54fa4a7/gikuxudesodaronifelizusu.pdf In PDF document text
    • http://emilygrilltogo.com/uploads/files/geregajemerolak.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b48caa3b3ebae648d1fd9b56524026e5/27898882355.pdfIn PDF document text
    • http://bio86.fr/fichiers/69697657507.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/14098404370.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608f610dde5ef---bufivogukiwivibusujip.pdfIn PDF document text
    • http://hitoduma-d.com/files/files/fidogoluxumilaporetugedun.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/wozetubufapiwab.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a310693560---giperibabuzi.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/pekipadaveni.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b449f5846d2---fetugiwerivumekukutar.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/4afc82d677a7c799b4a8538aee346cb9/69873494563.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/re7ohm0jecvq5f2p0pbm8p15c6/18930253565.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/c04b3e9806cba6fef0546ef1f9b43705/gagegakutuxamiraxeluzuge.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/60031095473.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8a0f399027d15c26b942c9fd35cd4072/karipolavumajosisepelom.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b6038f10a---78076724296.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/dcfa37759a37302de7fcf3390fd9556c/jiragureboditimadagoxi.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210625233810.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6355ab549---zipobegedanepivituzinode.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/6034e7d860929b17f08236c3706ab8d9/veziziwijajedanevexukiwis.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64cfe2081e---fenabijawafeb.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/157c4a7ac640c009cc746b5ee72b0801/sipimuwabo.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0651dddcb2---suturuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=signing+naturally+unit+3.12+homework+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001123f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123F 11432 bytes
SHA-256: 72b73388e695d7a53932ed7eed81b4fbe0c8d6a4d7bdb297feb520ea86fa577a
font_01_sfnt_off00012d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D41 18176 bytes
SHA-256: e563c1e3fd6bf82b2e09d8d3a504251d02874c5d309670b123e4590cdc06384a
font_02_sfnt_off00015d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1