Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1f91a4984ec35e…

MALICIOUS

PDF

107.8 KB Created: 2021-02-19 12:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4669c7f17dc7e89e5dfa896b5d29d880 SHA-1: a2b23bf5b7743c791705f00ae3a190ed67856309 SHA-256: 1f1f91a4984ec35e1a726534525f4eb6586da3ee4fa264c8977e4b3263a16136
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 are SEO-themed, suggesting a link farm or content spamming operation. The primary URL, 'https://seumenha.ru/wix?keyword=catcher+in+the+rye+banned+states', appears to be a lure to a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/wix?keyword=catcher+in+the+rye+banned+states PDF link annotation
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/df4bf0326b3b.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/bivofikare.pdfIn PDF document text
    • http://igcopyrightverify.com/xozakitepusfpjmx.pdfIn PDF document text
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/ae6a31074a2d.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/hUQjchb/xademifalebufinut.pdfIn PDF document text
    • https://cdn.sqhk.co/vepanoxubere/ghjahgi/bomber_friends_mod_apk_latest_version.pdfIn PDF document text
    • http://mon-cmbretagne.com/suntrust_mortgage_payoff_mailing_addressdvmnb.pdfIn PDF document text
    • https://pipepixowufoxo.weebly.com/uploads/1/3/1/4/131452867/numurime.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/xiwiba-nexafetaje-jibelusab-sanuloxep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/movimiento_rectilneo_uniforme_su_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/bartow_county_water_quality_report.pdfIn PDF document text
    • http://josatagosovux.rf.gd/facebook_live_flyer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/monument_valley_ios_apk.pdfIn PDF document text
    • http://vitupofelomar.epizy.com/kuwogexawimopaxunaxifibik.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/duplicate_marksheet_pune_university.pdfIn PDF document text
    • http://tobizexajivuvob.epizy.com/50882181012.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/hanuman_bhajan_odia.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/3._5_demilich_template.pdfIn PDF document text
    • http://wotujemun.rf.gd/39420387140.pdfIn PDF document text
    • http://jitikatul.rf.gd/jejuveguwuvupipezixomovuf.pdfIn PDF document text
    • http://lezegunotoxom.rf.gd/blood_stains_on_bed_sheets_causes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001602d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1602D 4936 bytes
SHA-256: 85baa3b459754105abc874af763602e43741e102a4c8001d57d84a3d6f3e8553
font_01_sfnt_off000170e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E6 10048 bytes
SHA-256: 84217a03b0ce34ebdda51640bd491f84260744d61061eb76e977db6a4ee1e77f
font_02_sfnt_off00019356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19356 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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