Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e1eedf4b7930a8…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 01:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd52798da1b33798235bd3021d61ee4b SHA-1: 3e33c95e68b15a11c24bb4f1e14ba2372eee41ec SHA-256: d2e1eedf4b7930a88b3e4a7a72932d081d186c160729158bcd93c0c840b4885e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable links. Heuristics indicate it's a small, link-farm-like document hosted on disposable domains, typical of phishing campaigns. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=gangstar+vegas+pro+apk
    • http://phamtrangia.site/upload/files/86437911776.pdf
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/23398934202.pdf
    • http://makesomenoise.hu/upload/file/zodimu.pdf
    • http://www.julietlandau.com/fckeditor/userfiles/file/sesafukiwibozaxosaj.pdf
    • http://tksvolga.ru/userfiles/file/guvinawuvazotefedifikada.pdf
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210905_124941.pdf
    • https://ccaquebec.com/userupload/files/suvopujerevalow.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9099d4ee84b7effbb6dde074908bef25/vatopibusegamotil.pdf
    • http://c2r-auto.com/uploadfiles/file/2021091011460073499.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/76974d5fe33e8e143a852681a9fab0f8/paposonuwik.pdf
    • https://kfmaccounting.com/webroot/img/content/files/rubowunavim.pdf
    • https://pielinks.com/UserFiles/file/nojetekoragezilezexe.pdf
    • http://qbcar.ru/ckfinder/userfiles/files/bajuguwizazib.pdf
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/petupusowakemomufofu.pdf
    • http://huabulaw.com/uploadpic/2021-9/file/2021090822490173499.pdf
    • https://nhahangbienhaitien.com/uploads/files/45683675777.pdf
    • http://www.morrisjones.co.uk/EditorImages/file/dogetideponunetes.pdf
    • http://nanouklid.cz/upload/file/38183952507.pdf
    • http://africareview.in/userfiles/file/81803612511.pdf
    • https://aronabritcan.com/userfiles/file/xuxujizijiximinonaja.pdf
    • https://letstravelforacause.com/miet/assets/files/12801056637.pdf
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/zanuxupaz.pdf
    • https://media-get.ru/userfiles/files/nilapomosizutaroselixur.pdf
    • https://reviewz.eu/app/webroot/files/userfiles/files/luvezarofipififoj.pdf
    • https://textosl.com/upload/editor/file/dumeponopud.pdf
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/xatunifelapex.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_off0000b320.bin
03d372f7774d0303fcb3636d1377f25b712451a99cf3f9b41414c36414a560e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB320 10488 bytes
font_01_sfnt_off0000cb2d.bin
ac59fbf87e2c5c2b3687bf6836aa443c1ae0d16ae97ff314c3512bf2633a367e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2D 13968 bytes
font_02_sfnt_off0000ee0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 16792 bytes

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