Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c136e95cb3a5eea…

MALICIOUS

PDF

82.0 KB Created: 2021-06-29 00:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4a7d72e96200e8fefacbe548bb291ea SHA-1: 60ca6555ea48c7390941f71788af8c1299ce26d8 SHA-256: 0c136e95cb3a5eea8a37a89c56588560e2ecfa4d013c794bf3700fe33ffd8f22
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and heuristics indicate it is a link farm pointing to compromised WordPress sites and disposable hosting. The document body, though heavily obfuscated, combined with the heuristic 'SE_ADVANCE_FEE_SCAM_LURE', strongly suggests a phishing attempt designed to trick users into believing they are involved in a lottery or prize claim, requiring further action that likely leads to financial loss.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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=sonic+forces+sonic+exe
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/755ujp1d44fb1nkof00j1ikdo4/romixoxuzu.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073832f59864---8278278656.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160acd928d454d---bitojenufigubirononawaf.pdf
    • https://scriptdd.com/_file/file/55253731482.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf21101ab86---wizugofawoj.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/48bc752786b513e210d7304dcde7d1f1/50409459607.pdf
    • https://abe-rdc.com/userfiles/file/naselaxudefidipuwipujotaf.pdf
    • http://easternsheep.by/app/upload/file/fivizidulolasit.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb476433c9---lorirorevapoxepigiveduju.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e8408a1f5---21328792729.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8bc6b537b---19958660068.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s353oc7cbk4pt969dro0q9put1/farejukujutewatumuvibog.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609854e0a049d---1920255855.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/clqno43u86q0ovo3e8vn20eabq/jamegivijidapediwatetelob.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851660636e1---xinerokibuwedoxigaso.pdf
    • http://driver-jazda.pl/upload/file/13262151142.pdf
    • http://chi-kara.net/userfiles/file/3610715251.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1c9f6044b---bazixuravopenili.pdf
    • http://hasyo.net/files/file/riboka.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bbb30f29---fegupexagesek.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/28d7f48738ceb355a9cbc32a81c0aa4e/xefalusatam.pdf
    • http://piri-piri.pl/ckfinder/userfiles/files/vagutogena.pdf
    • https://lee-trading.tw/archive/upload/files/10890163303.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/7577852163.pdf
    • http://hnkingdee.cn/Files/file/2021624154421.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_off0000e09b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 16792 bytes
font_01_sfnt_off0000f8ad.bin
0b44bf8c7c0a49cfc16d6ed2bc49e091706ea33c22b0e5d1c1cd651fac678695
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 16540 bytes
font_02_sfnt_off000123f6.bin
f54bbb9df18000c1a27ab72e283b8bc648a5c7931094a808648ef752b94347ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 10200 bytes