Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2389c06a44be1b…

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 05:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e495466d672d281cced0db30ce87da8 SHA-1: 3c83533d4801b0f19af0ea4c475ef4fb4d9fece8 SHA-256: 7f2389c06a44be1ba0cbae0892f0c3e463b500e115779b5e1de5c64a99d422e9
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to compromised websites and a deceptive download button, suggesting it's designed to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and linked URLs strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=compress+video+file+size
    • http://interiorconsignments.com/media/file/xegaw.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/52bb9c25f305b930926fe07a39c46134/mepibejoposekojewili.pdf
    • http://backkwang.com/userData/board/file/59691776590.pdf
    • http://plastikacz.cz/soubory/files/xogarawosi.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/dd281608e2ba35ee0d37f0f07acc7f19/20103760220.pdf
    • https://bursakaynak.net/userfiles/file/jumur.pdf
    • http://riskhedgetech.com/uploaded/file/28180127660933013ca4d9.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a5287341a---38123735077.pdf
    • https://houstoncoinshow.org/FCKeditor/file/24551816206.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f499172a5---sovuxonit.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/8pfcu3kia26ce74s50c1i0ka41/64720600607.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mgqikj716cjkv15tj3250vmtg7/kodusejareredugazipegir.pdf
    • http://onishi-kyosendo.jp/archive/nowetaletuvo.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606facf929ac2---65118369697.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16071095fed454---zoruzurigito.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/rdadg3tljvpf7evj6ag19oes3c/78057172525.pdf
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/41291988909.pdf
    • http://emurus.jp/userfiles/file/85817877137.pdf
    • https://pet-fashion.ro/mm/file/93871699918.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe3a9a07b6---tegevobemomazojajakumu.pdf
    • http://aaaexpressac.com/userfiles/file/mozejazisatof.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ot0l698ghr521ff6l3bge6h9i3/goxoralesodipolodolipun.pdf
    • http://wtmongolia.com/materials/file/rovisowekekogadijifabaxoz.pdf
    • http://sanmargholidays.com/ckfinder/userfiles/files/xemanurumimajeradedise.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607222bbe001b---xugusosewimawizexej.pdf
    • 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_off0000f05d.bin
d52df3d4556fa22f52820dd919a03f27481405b06f8d15676a95b75d32dd33d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 16704 bytes
font_01_sfnt_off00011bc8.bin
22bd11ac7b40622a1c471d2abb0f796b2fe07ba7e48aa887348e661839fe9cbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC8 10452 bytes
font_02_sfnt_off00013389.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13389 16792 bytes