Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bf2e1d803e072d…

MALICIOUS

PDF

164.1 KB Created: 2021-04-04 22:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f46a157910c1988d6fea766b6e5dde55 SHA-1: 61d70b50db1d2ffa081a6ae8ffab370bf352297a SHA-256: 75bf2e1d803e072d6955d60e6fbc10c3e72ca6c162533cece8ca17f4e7e5789f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'farmacologia de los ansioliticos pdf'. The presence of embedded URLs and the critical heuristic firing for a malicious redirector strongly support this attack pattern. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=farmacologia+de+los+ansioliticos+pdf In PDF document text
    • https://cdn.sqhk.co/xidodaxu/gpgfGhj/drag_racing_creative_mobile_mod_apk.pdfIn PDF document text
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/wamif.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/biaFher/44039110587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_605efffd2ccde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_60603199b95aa.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/jfhcgfc/94225498958.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/49a4cdb7ae9cf.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/88029a8c886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_6064fb7896fac.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/tewufebo-wapaxobinilux-bemovegiruzek-taputasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_602c4ed199dfc.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/tobojelusiwi/saxisebinigovuxikurofowu.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_f4d21526c3a24ab5ae310b16e64fb4ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajujiju/avery_weigh-tronix_640_parts.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_2e2cdce6456d4ffab703b4c7acca2a33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/english_letters_writing_sheets.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_5cdef598d1664730a78d9ef0c028aba3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/soft_skills_powerpoint_presentations_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/tudagewexelixixivofanuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/11681671848.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/43767202142.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/samsung_refrigerator_rs265tdrs_not_cooling.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_e6c836fe58f04a77ab758c26c04ab0da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/26517601682.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_off00023b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23B72 5432 bytes
SHA-256: fc89d2b828ddd66c0453a2847213624297fd82d6af81467b3999f223d421d5c0
font_01_sfnt_off00024dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24DD7 16380 bytes
SHA-256: 5771985f5fe720fdc8ce92bf99f6793f998b3187543b1ae14a572433262aaf04

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