Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ced1e08418638c…

MALICIOUS

PDF

71.1 KB Created: 2020-11-25 13:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d3ffdd79b6bd79230ca566a617624453 SHA-1: 1efb756c7901c99c55cfa33137a95af1c19c4d98 SHA-256: e1ced1e08418638ceeb0bbdd05067eec5bd26b7eaf404fadc8902ed02a40ebb8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://trafftec.ru/123?utm_term=ikea+drafting+table+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5fa80ba59d6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_5f8e15e08e32e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fa541c72bc4a.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/tokux_weririwiniza_kebevizuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5f99c3929e8aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f929490345d6.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/sebigemijesoj_piwidinuzad_repasekikigavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5fa8af14bd49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_5fbdc616a17fb.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/wijelul_fovarofe_gomewidefo_tipoxomifirovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f945030542fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_5fa8efbd12ae5.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://uploads.strikinglycdn.com/files/c4f0e4ed-c916-42bf-bed8-872957920c00/burefupotilinudol.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/ruger_vaquero_grip_screw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d97aa8e-1805-4b82-a226-91a6ce5b4d3d/11219590028.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_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 4924 bytes
SHA-256: 7387a1bed52dd06f69e08a868d2ad9469ce087d38d3b68c1b68c0ee146f08d4e
font_01_sfnt_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 10704 bytes
SHA-256: d4c379e583afd776fbb86b44ddc25d1343af7731b12bdb13b9dbc02ca81221cf
font_02_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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