Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5fc5a7dfd947f0…

MALICIOUS

PDF

94.7 KB Created: 2021-03-19 14:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f5a43207772c8e3ae4d717bb68d3404 SHA-1: 7907b00161c28d918d93f3e4aa353afe0b42381d SHA-256: bc5fc5a7dfd947f0081178a44670a40c8a4e0804583c26af8b1f2b5f8998841d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered via spearphishing.

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://druttle.ru/wix?keyword=hunter+training+rs3+fandom
    • http://autoport76.online/driving_school_2016_hile_android_oyun_club11grr.pdf
    • https://cdn.sqhk.co/vojogalu/ruNZDhg/fovanulam.pdf
    • http://sellforce.ru/91381815856abgcg.pdf
    • https://cdn.sqhk.co/jovowosifo/jjibjjx/71120460680.pdf
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/poguketexem.pdf
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/famoje-tavegujukegujud-dofibi-xofitiwepiko.pdf
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/lekeretasa-ladixinujurajus-kiponadijuz-poniw.pdf
    • http://fuxuxixigu.scienceontheweb.net/51885699361.pdf
    • http://ladekepevij.mygamesonline.org/how_to_make_a_cheap_wood_splitter.pdf
    • https://kevulukopefot.weebly.com/uploads/1/3/1/4/131453006/7f1a75.pdf
    • http://dujojiwasemob.mywebcommunity.org/12_math_rules_that_expire_in_the_middle_grades.pdf
    • http://numulul.mygamesonline.org/master_forge_grill_model_l3218.pdf
    • http://zodatowafe.getenjoyment.net/hp_officejet_5610xi_cartridge_error.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_556dd36f0fa0461c8e930698189daf49.pdf?index=true
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_e2fbe8042c2d4c49930b64a04cb0303a.pdf?index=true
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_87be6e5a04aa45f088e9d005b4f34a64.pdf?index=true
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_36d862dae9474728907ed4bbad7f7e48.pdf?index=true
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_de34bbaddf894daba75fe01a1b9a6876.pdf?index=true
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_7366a562c27249ac97cacb5fbe641150.pdf?index=true
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_8e4316c8d5384c84b0aac7b934144e1c.pdf?index=true
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_0e1d244eb39240879b5cc433c4be43db.pdf?index=true
    • 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_off000134c9.bin
e7f56667aa990098111b47e13dcf4eef2eac0752256eeeda46ea8bb66f3c2fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134C9 5320 bytes
font_01_sfnt_off000146cc.bin
0f6f22d611c9cd46b8d11cab18142fbd7b3adc74b1630e38a6010ad071983624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146CC 11512 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.