Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e01921fee1a59f…

MALICIOUS

PDF

80.7 KB Created: 2021-09-16 14:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9de2cb5b5bea0348c938c00954752c3 SHA-1: 946ae68407f9c3d5c6b71396cbfe498d828cbfde SHA-256: 85e01921fee1a59f6f7572a4518257a2d2af8b98f7308073bd1dcc565dda687d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, including one that appears to be a download lure for a game APK. The presence of a visual download button heuristic further supports the phishing or malware delivery attempt. The document structure suggests it is designed to host a collection of links, potentially to distribute further payloads or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://garglob.ru/uplcv?utm_term=download+bleach+vs+naruto+apk
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9b98f3c8d4e25577d14bf0bb4c9e42b9/67789879650.pdf
    • https://yesilkoyluleriz.biz/resimler/files/71678783948.pdf
    • http://hutnia.pl/userfiles/file/78632647674.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/643kp4nvmajc4h3cbime424joc/sadajano.pdf
    • http://uniroll.pl/user_images/file/15521479698.pdf
    • https://cpsguffanti.com/uploads/file/91982623970.pdf
    • https://alatheir.com/atheirwsfiles/file/kutafo.pdf
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/jofuwowafevovefegesirupa.pdf
    • https://sandp-engineering.com/ckfinder/userfiles/files/vajaxaxijasokikikogobemin.pdf
    • http://speckletrack.com/update/editor/file/wirubed.pdf
    • https://finliz.lt/i/File/fovujilugoxipuzada.pdf
    • http://vocal.bpv.su/content/files/files/raxefawipoburexoxi.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0d00b5252d2067dc59b3a8fafb156fc6/paxegepedikotezaguxoxaf.pdf
    • http://mientrungland.net/uploads/image/files/gekawerodatonifo.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7a109496b---74953501259.pdf
    • https://simorgh.it/uploads/file/66354579443.pdf
    • http://esistore.lu/userfiles/file/bakoluzamajuzuw.pdf
    • http://pk.mo/userfiles/file/dotezejufukagefa.pdf
    • https://indiachristian.org/uploads/files/55358895285.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_off0000d743.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 16792 bytes
font_01_sfnt_off0000ef5a.bin
226b20fd62b88d57a5e78a1255442d1add48c40816e719a29d7f1c809bf5db14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 11004 bytes
font_02_sfnt_off000108be.bin
9db71719bbe8f7fdfad18577f183ce626bdf2c87696e0df42ea16eefe3472f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 17328 bytes

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