Malicious PDF — malware analysis report

Static analysis result for SHA-256 290b916aea129fcc…

MALICIOUS

PDF

73.1 KB Created: 2020-12-09 08:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 694a152ecf98a43f81e4995fdafa1aeb SHA-1: 15d76ff5527cbfe4b5d8afe4d315c57783309f9f SHA-256: 290b916aea129fcc44ab2cf097bcc75331af77a96b1ec4969f9bd32d431699bf
186 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 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://traffset.ru/123?utm_term=my+green+mattress+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f8d8c7be3b59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5fbc8b7db395a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fb307d7b55b6.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/tapuzuvisekibinifip.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/ludizirapipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_5fabc720bbe96.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/247258.pdfIn PDF document text
    • https://kololopobiro.weebly.com/uploads/1/3/4/8/134853362/gamoxixulujopi_panome_dojatomadal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fd043b3a2182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451365/normal_5fa40355f340d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_5fa50eddc6f59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_5fc2cda91b3da.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/25d8cdd6c72a1.pdfIn PDF document text
    • https://mosevulex.weebly.com/uploads/1/3/4/8/134860143/8f0c5078d7ab2.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/7103a508-2ef2-42aa-8909-2e5409430765/mod_apk_sites_ios.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off0000d28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28A 4908 bytes
SHA-256: 90ef3ce97243999e90f34376e05dcdff90eaeeac9da64a89f374848f97395f84
font_02_sfnt_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 11084 bytes
SHA-256: 5328c78feafb5b892c5c48ab425d363843f5e1a2d67a9d154814b4c0ec00da70
font_03_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.