Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69995d3bc5eb683…

MALICIOUS

PDF

81.3 KB Created: 2021-02-20 22:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19be4afcba52ced4aad643732ad42a3e SHA-1: d5425de2bb90890a464ea986d57a53b87a707e66 SHA-256: b69995d3bc5eb68327075b5db1f19485240edb4c263c5cb451494c4a959b2a9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with the primary one leading to a suspicious domain ('maypoin.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to broaden the attack surface. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of multiple suspicious URLs points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=cowlitz+county+treasurer+property+search
    • http://nikaold.site/scrabble_word_finder_game_free_download60mvy.pdf
    • http://reabook.online/16168283014rrcqs.pdf
    • http://lg-supportteam.com/free_handjob_von_klixen7dbua.pdf
    • https://wezusutuxalik.weebly.com/uploads/1/3/1/6/131637092/misitenozikin-sidexovinovid-lugeguwojuj.pdf
    • http://blue-tick-central.com/marlin_39a_owners_manualvp9hh.pdf
    • http://edapog.online/netflix_android_apk_xda7tnlt.pdf
    • https://bejelopaze.weebly.com/uploads/1/3/2/6/132682113/5271734.pdf
    • http://eurosett.net/deformed_bar_bendingocou4.pdf
    • https://vafobuzegigotot.weebly.com/uploads/1/3/0/7/130775214/mujar_xaligepesozixu.pdf
    • https://ganalazukomej.weebly.com/uploads/1/3/4/7/134714395/1297057.pdf
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/pujujerilode.pdf
    • http://priz24.site/hamartia_in_hamletnbb29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuses/contract_agreement_format_for_consulting_services.pdf
    • https://s3.amazonaws.com/bevarolimesale/cad_for_mac_free.pdf
    • https://s3.amazonaws.com/bovenotojitowe/41951614961.pdf
    • https://s3.amazonaws.com/genedesowul/pifakiwitebowo.pdf
    • https://s3.amazonaws.com/mikibetiv/quarterly_tax_forms_for_llc.pdf
    • https://s3.amazonaws.com/bokofapig/salirevuleji.pdf
    • https://s3.amazonaws.com/desenaz/balestier_hill_primary_school_uniform.pdf
    • https://s3.amazonaws.com/wusone/best_electrical_engineering_masters_online.pdf
    • https://s3.amazonaws.com/kefefetafij/64294699634.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010528.bin
15d6c088358830352415904f36e4edc99f08ecf535d2e61ff6c2f6a3176a6d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10528 5168 bytes
font_01_sfnt_off000116cd.bin
950846d26ed86d3c7cefb786220f04f558226fa1afcf234e15e4a3b25b6891ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116CD 9604 bytes

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