Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d964a25adb9065…

MALICIOUS

PDF

84.1 KB Created: 2021-09-24 00:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 975a516a85367a3957502529f22978bc SHA-1: 4969f8f1fe6d6217719354e30099c495c257b40b SHA-256: b0d964a25adb9065541fb1f87e156148e8ce86a1a8b28cac7f4d416cbfedda59
184 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. Heuristics indicate the document acts as a link farm and employs lures like download buttons and QR codes to trick users into clicking malicious URLs. ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://garglob.ru/uplcv?utm_term=stream+apk+download
    • http://yokosohk.com/files/fckfiles/file/jewaxuwal.pdf
    • http://ckud.handysociality.com/upload/files/bazexidujegax.pdf
    • https://ags-car.com/upload/files/kunopevezojiborewomun.pdf
    • http://mebel-moscow.com/content/xuploadimages/file/bilasazazevebavajinanugu.pdf
    • http://milkexim.ru/imgeditor/file/28891408373.pdf
    • http://gldbirdgel.com/user_img/files/vazozabeda.pdf
    • http://aimic.com/userfiles/file/runixazusugevamuviwabus.pdf
    • http://agppi99.pretty-match.com/upload/files/fizidedibusavi.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/zukajibuderejuduwizema.pdf
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/xotoxuninisol.pdf
    • http://kamnitikamini.si/upload/files/lenuxaguxub.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614380d6b8dab---binanafax.pdf
    • http://yejida.com/userfiles/file/dagibavilovinanisowos.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/bcb56de55a3dcda8a1c4929506159461/60542270825.pdf
    • http://hindel-relax.ch/ckfinder/userfiles/files/rigifedipo.pdf
    • https://somogyplusz.hu/files/48637219067.pdf
    • http://asiancfea.org/userfiles/file/53299413272.pdf
    • http://lixupeng.com/uploads/files/44592814221.pdf
    • http://sztarmedia.hu/_user/file/76493465936.pdf
    • https://proartgaleria.hu/files/files/vadelefenupusej.pdf
    • http://aurastaffing.es/upload/file/juridolejubutarikebirakuz.pdf
    • https://www.profiemg.cz/upload/ck/files/gevejujazabixoxafipeji.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/18e48eaf40cc032b3d4359d799b5b7ac/lezigitisabopugud.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_off0000e1ec.bin
7f7d32ffe4ee0d743e421afd63311ef47ef78fa552cacd6c5b7eed526ff8a8c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 10544 bytes
font_01_sfnt_off0000f9ff.bin
2cc095cbb74674a879254ae259216f7d9a9ffb9ebcf00b215a4d36779f1661da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 18884 bytes
font_02_sfnt_off00012a9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9F 16792 bytes