Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6c16ef041f56a2…

MALICIOUS

PDF

69.5 KB Created: 2020-11-24 18:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ffe5b66e23219d08b645e99107d31703 SHA-1: 797bc230eb79c9410be463f85b0deaed7c537ad5 SHA-256: ca6c16ef041f56a2dee42884258e3285bbf870efae8cf2e48710ddcb8d5b49f1
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=weathering+with+you++online+free PDF link annotation
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/6850936.pdfIn PDF document text
    • https://xilevaxe.weebly.com/uploads/1/3/4/3/134391777/8463403.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/bonemuxidazur.pdfIn PDF document text
    • https://lefasibemaji.weebly.com/uploads/1/3/4/5/134589759/cbc1129607a.pdfIn PDF document text
    • https://sunigudeme.weebly.com/uploads/1/3/4/5/134503290/werotunupojox-gesidap-tadetaritesaxez.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/wafekulomomaji.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/b22e59d2.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/nolarifaforuxop/63094256532.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/xunufopisamekigag.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/farenokeradavolelilag.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/67276425281.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/94492173154.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/28278655990.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_off0000c388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC388 4940 bytes
SHA-256: a48078c6e70390f71633553f3585a08c15704efb8efc4768e393787c4f7efdf4
font_01_sfnt_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 11596 bytes
SHA-256: f46d1c95bd83c28a4d17dcb031aaa952fd1ed0c6005cbf5715976c1d691a664c
font_02_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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