Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43294778532d21c…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 23:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 46177aaf8d721890d1ac04e9eba2d1fa SHA-1: 20e6bd03d573cbc191ac70de49bc03b2c3d6398e SHA-256: b43294778532d21cda04c95f106749600ed155865a31eed17696e5356d4cd5d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it functions as a link farm to redirect users to malicious sites. The presence of external URIs and the nature of the links strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=android+rotate+pdf PDF link annotation
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8afe4a93---wevog.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/jibegojoxotaf.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/b8opkjdha4u6n04v9j0rebqdrq/ziwumomidogale.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/ruwuzu.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/74697543771.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e57a9665001653dc04cf930d3c9186c6/bukijuli.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/96203028015.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/7ecu0he1n2l9civ82jbhpffoau/jekoxudez.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/28ed174fe318c7381bbd64458aae4297/50358228022.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7b6e964a7a9f4db7ceb30164bb2a9cbb/misiguvoja.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c25db6bf55---45177991959.pdfIn PDF document text
    • http://phongkhamducphuc.net/images/files/wudugewoj.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/nanigugazojetorip.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075934fb5800---timonuwererusoju.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/wivebeduvipeteta.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2cfd805854fbf497df84d2852e25033e/81402793396.pdfIn PDF document text
    • http://sparkpro.lv/content/file/pafagogilobejem.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/zozifipaxixinimifi.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ec52dba54---38930374141.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210630231556054921p2nwof3725dg.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b65dba83319d741c6459041bd7068053/roxapamesavusoporef.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0ef05cb0c5bc6e6a52c87e430cf93198/wefef.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/pugogot.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/xofuvosiladokamagu.pdfIn PDF document text
    • 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_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 10256 bytes
SHA-256: 2d3b610613a24e70a4acd24c987c83b5cefe4341e608d0b532c0ffd9da03bdca
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D4 17392 bytes
SHA-256: 9c61e5715950a3fa81ad1bea8cd32f410e52d9e0fd0ced2c555d3bbc7179ffc7

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