Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2de1c2b33e69b6a…

MALICIOUS

PDF

87.2 KB Created: 2021-08-23 14:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6ec855ea848fc03178c8390507970ecc SHA-1: 7a95abea3b8dfb423a2726a71086fea30d8a2449 SHA-256: f2de1c2b33e69b6a5197cfc10be328178758d3f747318fcc0f1a392051c5b2a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to compromised WordPress upload directories. While no scripts were directly extracted, the nature of the link farm suggests it is designed to lead users to malicious or phishing content, likely via a spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/0gr3mt8bnm2ttgke5dljbfkpho/78974615309.pdf In PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/limolexulakovurivumig.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/gjop6r798rp7f6u69s1ea7fed2/misuxiwuvodobobit.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/wejoxuparowisanosarapu.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/2393187719.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160baf3330a02c---32140943130.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/afd90831edfcdfd1560d9a097bc8bf74/xegubafulafosozida.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/kotasuzigesapegifegepaxug.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/14101128665.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922f6d8cb32---kijorunule.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/83ji602tbe83k9fh9tbqej7ls4/45187135997.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/95045393.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/ramijudonojoxob.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/15794280295.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/jaluruzezuf.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/050632232071.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/fomomulivosupazakoz.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/39909986283.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/bs29s302rajvl7kfn8t5f2tuo8/pamazegimawuzevozaze.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7bdfd64be625ea24c29e46b5e17999de/ginuvazovigulavava.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a3e1616e809d44df3d42c43c3e5b942a/jumivilusigowozajafima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=left+and+right+axis+deviationPDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/nakipezejuxa.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_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 19396 bytes
SHA-256: 9083cdf0b6fdc20e7a095d14fb564db7ae9d0d5c8cdc974438dccd103c18f5d9
font_01_sfnt_off00011e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 10712 bytes
SHA-256: 74cd78e91b3cabf19fccdff15a18112eb0e4e10cf3edb534e8c9a891004dc326

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