Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac112ec14b4bb8d5…

MALICIOUS

PDF

121.3 KB Created: 2021-02-27 20:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 037020a30153703b7541d2d6da9d58b0 SHA-1: 53142c72761324b17790b09d27cb56459a43217d SHA-256: ac112ec14b4bb8d5f11c4c41fe521002512097bd50658ef0b3fa7e698aba290d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/123?utm_term=what+is+the+best+point+and+shoot+camera+under+%2524200 PDF link annotation
    • https://cdn.sqhk.co/doxutijewu/iHjcojg/kaiser_pharmacy_hours.pdfIn PDF document text
    • https://boxakowomer.weebly.com/uploads/1/3/0/8/130874011/gigazaruru.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/zovepakalawanavop.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/cd8jfgP/72642894118.pdfIn PDF document text
    • https://dobuwejakunarek.weebly.com/uploads/1/3/4/7/134772316/55d431f8aa74c.pdfIn PDF document text
    • https://fenuligor.weebly.com/uploads/1/3/2/6/132695430/2538703.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/ohajcug/38916582176.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/yjeOijF/samsung_galaxy_buds_plus_warranty_registration.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/hjv4aji/41086670397.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/46210.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/tabobujimo/louis_vuitton_date_code_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/candida_glabrata_uti_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/cheque_issue_register_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/8347222019.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/81914145187.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/drug_handbook_for_massage_therapists.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/jafumupawokeded.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/ib_biology_textbook.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_off00018aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AAA 5828 bytes
SHA-256: 3460612f7deac25f764e3c733c13e422ad2d2cf297b0c85cdab4d88da96d31cb
font_01_sfnt_off00019e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E4A 13244 bytes
SHA-256: 5db65b8dea1ac80dd9a059d3edb9a01d263ad84e6dd068e389f16725090f86d4
font_02_sfnt_off0001c920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C920 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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