Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbdbd514299624f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-20 09:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a4eb6fc4ada07565bb8c04a1c4bbef58 SHA-1: 0c5d6f8248eb9b69950542dedeea9086e0ffd250 SHA-256: dbbdbd514299624f4936cd8e2c809bc404026b5956cffc74fc91ae06f2129948
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, https://xezojetit.ru/wix?keyword=eu4+holland+guide+2019, is suspicious and likely serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=eu4+holland+guide+2019 PDF link annotation
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/d586e5a38bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449422/normal_600e6970c77cc.pdfIn PDF document text
    • https://vopasigujar.weebly.com/uploads/1/3/0/8/130813381/5938103.pdfIn PDF document text
    • https://tedamitaza.weebly.com/uploads/1/3/0/7/130740371/688721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_602f14d4707ab.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/019226206a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5ff88ea4eda60.pdfIn PDF document text
    • http://dezodon.22web.org/wujuvawuruvabavadatu.pdfIn PDF document text
    • https://noserosajegupa.weebly.com/uploads/1/3/1/4/131453720/d319f8.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/4691659.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/lazesej/93053808103.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/21342010832.pdfIn PDF document text
    • http://vilolosukip.rf.gd/2326927919.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/octonauts_humuhumunukunukuapua_a_creature_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/vosipunalipasav.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/5548735186.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/alfred_wegener_theory_of_continental_drift.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/sebezaxilitusejelewakewu.pdfIn PDF document text
    • http://kexomuradalo.rf.gd/procd_de_contact_acide_sulfurique.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/vivumafuxerofofinivibu.pdfIn PDF document text
    • http://zimunumiwu.epizy.com/12891664904.pdfIn PDF document text
    • http://solobasoridevel.epizy.com/fawedofemireroxix.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/oklahoma_cdl_practice_test_general_knowledge.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_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 5144 bytes
SHA-256: f0ae0e82e63a4644e4ab46df2ae5b72c06d0a838996aa0eb373a50921512ec5e
font_01_sfnt_off0000fdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFE 11112 bytes
SHA-256: aed8cbed5e039d74d570a081ce630b775725bc875700ac989ce7691332fac57f
font_02_sfnt_off00012391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12391 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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