Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4118c60bd32cfdf…

MALICIOUS

PDF

72.7 KB Created: 2020-12-20 19:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 185500222cbcf90ea3091052b6e617b3 SHA-1: 7adcacd107b4a4dcced5ea5aac5e56793ee8ec2a SHA-256: e4118c60bd32cfdf961814c59ea0378241888788bc12b85ad8012a107efca264
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to a "Double bass drum set for sale" and embeds multiple external links, one of which points to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=double+bass+drum+set+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fd63e64a7dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f90a88491ddb.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nirajilosikos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5fa0d3085c0d0.pdfIn PDF document text
    • https://mulepulevuva.weebly.com/uploads/1/3/4/3/134366291/4192011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5f8c916c7f28b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c5f0a190b16b315bd63/t/5fdcfa365b0cfb6092b80b62/1608317494945/babur_gaan_laden_asil_polai_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd525e5b7bc966055e3a6f/t/5fde62e9c18bd5077c9e7cca/1608409833766/71388211095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec41288f-e217-4b25-906a-5e6c3c0ea2f5/torrentzone_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/23271039651.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd01a200f7af3919d4407d/1606222243124/julexopegixixu.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/dadewerexogo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a3195e8e827d4299026a/t/5fcbca3f1df7590d80e8d6da/1607191104270/apple_watch_sport_band_42mm_yellow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b05e92c50b1a1e7d1142/t/5fd101e206368f5bef0b41c6/1607533028381/pekiluda.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_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 5192 bytes
SHA-256: 71a87d007fa63b5d4c6b0e5cd12fb09460deb3dfb2f38a43319116b81e542976
font_01_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 10632 bytes
SHA-256: 5902eb9a4062d6e1eb10ba1ffb876f63489c3885fac7651d5a6fcfa1fe0b6577

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