Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f30a9e6dedf88c…

MALICIOUS

PDF

73.0 KB Created: 2021-09-25 03:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea28287dad1429cfa8236b79b4f218fa SHA-1: b62d3f6227fd2224a3e6016d03f38d626ed2fc11 SHA-256: 88f30a9e6dedf88c3223dac4708b8ff7d3f17cf62d763ae6cbd7e7cc24b62d9a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to disposable domains, suggesting a phishing or scam campaign. The heuristic 'SE_LOLBIN_RUN_COMMAND' firing with 'powershell \ v1.0 \ PowerShell.exe --noprofile -input format' indicates an attempt to execute commands, likely to download and run further malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0', reinforcing the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161448330d0ab9---xesusetesaxatipimu.pdf
    • http://mixline.ru/img/lib/file/86421411959.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c066df9a68e7fdbebdf578db5755fca3/84815153063.pdf
    • http://demkapi.com/resimler/files/refajisemobinakijijuvogin.pdf
    • http://exosportsante.fr/ckfinder/userfiles/files/kiroruvabezenopilopolibov.pdf
    • http://sweed-trans.eu/ckfinder/userfiles/files/siduxoxogibunoxigajubuxu.pdf
    • https://ymvii.com/admin/upload/files/rowujarosava.pdf
    • https://coverline.ro/userfiles/file/80081093492.pdf
    • http://otworz-biuro-podrozy.pl/userfiles/file/57755208695.pdf
    • https://maths-pdf.fr/ckfinder/userfiles/files/44991683693.pdf
    • http://baodieptailor.com/uploads/2021-09-08/images/files/xibuzipav.pdf
    • https://projektovanje.info/userfiles/file/temabulegumalone.pdf
    • https://olivermilk.vn/tctt/sites/aaa/file/65279807039.pdf
    • https://unitytradefze.com/ckfinder/userfiles/files/medanuxanutobepa.pdf
    • http://massvt.sk/editor_uploads/system/files/45457996737.pdf
    • https://nakshistudio.com/ckfinder/userfiles/files/jolutiporexalozanulogi.pdf
    • http://elturo.ru/img/upload/files/13977569889.pdf
    • http://sithome.com/upfiles/file/20210921114937.pdf
    • https://ost-fogging.com/upload/files/79334647303.pdf
    • https://consultemergingmarkets.cubsindia.com/files/xedejamufisufudufejese.pdf
    • http://heyumpnd.com/userfiles/file///mebarixifanalupodeziwa.pdf
    • https://ud-hobby.com/images/Upload/file/61331599865.pdf
    • http://gewidor-gmbh.de/uploads/files/79479381990.pdf
    • https://amrapalispot.com/userfiles/file/fafagapirawopiji.pdf
    • http://daugiavanthienphuoc.com/media/ftp/file/xizadizonebarapifodego.pdf
    • http://fine-trading-knotwork.com/uploads/media/44344975641.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+install+android+apps+in+windows+8
    • 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_off0000b72b.bin
bc708bba6d38e720d670a1ab74cf6e675ad6ccb4fdf9e763fc1366f0fedcc590		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB72B 17692 bytes
font_01_sfnt_off0000e56d.bin
d40428a3c11a56038ecee01b7f7bc356f523bfe9e87fa70dda6d70ac6e9c0eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 10536 bytes
font_02_sfnt_off0000fd8b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 16792 bytes

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