Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da1c6d0b2a230a2…

MALICIOUS

PDF

80.8 KB Created: 2021-03-23 03:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e69692d6a433f6fdac3c5daf72ed3f9e SHA-1: ec32007552d2d8e8c7da32cd37145e4bc5e05a84 SHA-256: 0da1c6d0b2a230a23268af211dded3daf4e91c63708ebcef54b9fe7541f15ee6
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for link farms or phishing lures, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=dotties+weight+loss+zone+points+calculator
    • https://cdn.sqhk.co/kitolitik/5fhiibZ/chocolate_frosting_cake_decorating_ideas.pdf
    • http://raisinsapp.club/32176844665kbmiz.pdf
    • http://tb-films.ru/738961149upo9g.pdf
    • https://cdn.sqhk.co/doparibi/7L5YifK/kumanijokojajiponekokipo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_b39a1cb8f48048cc876f7657abe331e3.pdf?index=true
    • https://s3.amazonaws.com/sefabe/subacromial_bursitis_exercises.pdf
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_359687bc16854d72a4eb44a1135999f2.pdf?index=true
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_1a9f1c89ab654193aed790d6750c59e6.pdf?index=true
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_0c85c638c649483882a441dfb88a556d.pdf?index=true
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_521704e8658f4c3abf0a82f66238a51a.pdf?index=true
    • https://s3.amazonaws.com/xifabilejilab/nejusejeradavufisoti.pdf
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_2746c3a10445419695e6caedb854469c.pdf?index=true
    • https://s3.amazonaws.com/wokesabisevo/62489143718.pdf
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_3047a3a918964a39b5ebbe9663a04a12.pdf?index=true
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_4d053a934dbb4f64b0994884bea7b12e.pdf?index=true
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_9b0c74026224461db785d3cc196a711a.pdf?index=true
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_bd076f82373b4c029280753dce50525a.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_off0000fefc.bin
af0b4ef5b7ddc4d2f68dd211baf9939d3c8148e4032055b875d5444ba3979414		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 5336 bytes
font_01_sfnt_off00011141.bin
6728f216c5a21ee031ef457f14cbc657aa8326ee6d7a5cb42e6a387bbb93200f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11141 10780 bytes

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