Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2a3a967aeaf78e…

MALICIOUS

PDF

79.9 KB Created: 2021-01-27 08:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6b4a35fb54996b092c31dbc91dbb76f3 SHA-1: c64254c006600620402e732577372330c276a360 SHA-256: 3f2a3a967aeaf78ea0ae1cb159fd60c9c80da2e6852a4fea7fdc7bb3f9cc9eba
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a link farm with numerous external URLs suggests a phishing or SEO poisoning attack. The document body, though heavily obfuscated, contains references to URLs that are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=harley+road+king+windshield PDF link annotation
    • https://namikefazexu.weebly.com/uploads/1/3/1/6/131606603/6038812.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ibhgha6/penixaterenipon.pdfIn PDF document text
    • https://lapawiniposa.weebly.com/uploads/1/3/5/3/135323982/tufevejejolukom.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/d2uhbif/94521178238.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/igjjVgc/rosavi.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/gjgge5g/crypto_companies_hiring.pdfIn PDF document text
    • https://koximewi.weebly.com/uploads/1/3/0/7/130775363/7968120.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/hhL1WYa/zombie_ultimate_fighting_champions_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/9thatIn/planet_bomber_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5fe7675bc8eb2.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/kikagilovukili.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/ixjgyDR/ruvinaziraro.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/tiaobge/bepunujozitaxadoter.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/c1MqVaT/snake_xenzia_nokia_150.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/zabejuvijolu/17470612505.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/deforugagoxurerewubisitub.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_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 5012 bytes
SHA-256: f89b0e98ceb194fcde611ee3a613d47b8623014ba0807fdb9ae52af1505e2e32
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 10972 bytes
SHA-256: abc2432c71e7d66930cba10663f4393418ee222145c9eac74cb41d94f706a36e
font_02_sfnt_off0001229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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