Malicious PDF — malware analysis report

Static analysis result for SHA-256 20956a285ea1e53a…

MALICIOUS

PDF

75.6 KB Created: 2021-02-23 07:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9f953ae5038a064dfa26a8dfc00ef323 SHA-1: 021a7ca96973bc0cb77bcb541328915e1c888317 SHA-256: 20956a285ea1e53a84aeb833bb60c0715148ab0f4f58766b7c4088d5d32c698e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/aws?utm_term=how+can+i+connect+my+phone+to+my+projector In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417023/normal_5ff6d256603e3.pdfIn PDF document text
    • https://nanagufema.weebly.com/uploads/1/3/1/4/131483019/sakez.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/SicciaF/garmin_us_topo_maps_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/ajegiQT/helicopter_game_apple.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383805/normal_600665082aeee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_6021a2604b55d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5fe66d139460e.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/ZbiqibS/zimsec_history_notes_africa.pdfIn PDF document text
    • http://apelsins.space/36143982959x0i5z.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/ibfyjd9/95042725897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zomekijisev.rf.gd/84365952116.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/original_cabbage_soup_diet_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/31611345331.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/paid_app_free_apk.pdfIn PDF document text
    • http://losagamadupo.rf.gd/lanozejodu.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_off0000e9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F0 5192 bytes
SHA-256: 7f4f52c2a0193fc9d05f6a88abc4480d30ce6121d25a80ec86d6d52d09543297
font_01_sfnt_off0000fb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8E 11044 bytes
SHA-256: 10220cfc6f06dfd3a6b0d58815c281f01ebeda24c8c3a3b7d6bad0bbbe2369b4

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