Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2da0590ba91dea…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 07:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b0c699b50d21c16dcc1a1eec355b8e5b SHA-1: 21462660b82623caff2eed3864859e871ea722fb SHA-256: 7f2da0590ba91dea6f09f7a3f34cb12e58a72d0213a78958dc17fe04da52901e
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.cc/pify?keyword=convert+pdf+to+publisher+file+free+online In PDF document text
    • http://tibezijuz.quikbild-international.com/uploads/1/3/1/1/131164250/a71305d634ab.pdfIn PDF document text
    • http://files.damascusbaptist.net/uploads/1/3/1/4/131406604/2357634.pdfIn PDF document text
    • http://files.thebryandgallery.com/uploads/1/3/1/3/131378993/8551307.pdfIn PDF document text
    • http://files.angiemoll.com/uploads/1/3/2/3/132303151/d0a5056bc32af14.pdfIn PDF document text
    • http://rajis.kidsonlineworld.com/uploads/1/3/0/8/130814416/1df4806f4e9fa.pdfIn PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/bosamuzorubejos.pdfIn PDF document text
    • https://site-1040771.mozfiles.com/files/1040771/99969140913.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/nozexowosewisazumobapem.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/xejatugukeluxip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0016aecb-2121-433a-b634-d96765aba26e/31433399634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b187b49f-30f1-49c8-b0f6-103a31c109f9/feburusevepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee948a26-2adf-4e8a-96bd-f9a64b9eea89/8124257761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc9f69a-ed62-4ee5-950f-72b1f0dbd1c1/23687753923.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_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 5024 bytes
SHA-256: 237bdb7e3a37c4ef5d09178405a5f4f48942968c8192f9a303246323f053a573
font_01_sfnt_off000076db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 10488 bytes
SHA-256: 42ce39d8756731dc9eec4d826a63ccba68363fbb6b9077de4886bbceda4f30eb

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