Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df7ea137bdbc319…

MALICIOUS

PDF

80.0 KB Created: 2021-02-12 02:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 82505de354397533e942652690091d63 SHA-1: 24c15cddcc1974e8816b04a74f6ddc537d0a1dd2 SHA-256: 6df7ea137bdbc31931a99abf01698482d13ffc9cca4449e4a824f295c09981cb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to malicious sites or download further payloads. The document body, though heavily obfuscated, appears to reference an "Iphone 6 repair manual", a common lure for phishing scams.

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://seumenha.ru/123?utm_term=iphone+6+repair+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5fe52f04b43c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_5fd647dfe6ffe.pdfIn PDF document text
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/1547517.pdfIn PDF document text
    • https://veledagovivavav.weebly.com/uploads/1/3/2/6/132681602/6686848.pdfIn PDF document text
    • https://mexupapomumag.weebly.com/uploads/1/3/0/7/130775103/55a8f8.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/newebabevazobag-jukazoge-misibatozuraza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_5fd740498881b.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/1174807.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/7017311.pdfIn PDF document text
    • https://xajupodesuze.weebly.com/uploads/1/3/1/3/131380723/6816587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_600fc81e934fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375703/normal_6004069eeb3bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/jodipijobumonupifuxeveki.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/hollywood_reporter_list_of_top_film_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/13871589996.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/lagu_benyamin_sueb_malam_minggu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/22040207040.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 4972 bytes
SHA-256: ef3db1f1885a7601c75b0773c7ad65cb15c002453a1936695c2aab4cefd8d8c1
font_01_sfnt_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 16088 bytes
SHA-256: d5e430c39fad94a358e35644ffa039c003f28299fc16d5adf91852dae1bb38bc

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