Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b1ef41498bb569…

MALICIOUS

PDF

77.4 KB Created: 2021-03-16 08:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 8637e92ffd59cb418a7447fa7877c486 SHA-1: 983f3d6b3bc0fe9ff7d0c0a8a11fffa88362ee0a SHA-256: 79b1ef41498bb5694f972632609b75aaec3117c038d60e9ed15fa27c8f2f3ebf
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or are part of a link farm, indicating a malicious intent to drive traffic to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://dafemum.ru/aws?utm_term=breville+smart+oven+air+frozen+french+fries+recipe In PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_60050ac583ba6.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/ZjjCheu/sejusevuvugebudufekimuli.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/zorozoloxox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5fda09bf742fd.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/jb600ih/vujemowisifipog.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/Lxii2ji/ml_top_up_load_globe.pdfIn PDF document text
    • https://dedidebu.weebly.com/uploads/1/3/2/7/132740692/4780100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5fdab71436c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_60432aba2dbeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496151/normal_5ff8ed9abe907.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/a46154f0eaca.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/b77895e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_604872c920299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_603b81e97987d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fd6649b71dfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/telasebisu/56344583218.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/64398146777.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/what_is_candlestick_chart_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/guide_cuniculture.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/lean_canvas_example_airbnb.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/femetuviturukuburemodele.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/optiplex_7010_sff_ram_upgrade.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE093 5412 bytes
SHA-256: 36de27bcc01f874171bc07002c48c8c72868454c6d52f96d6264cd7f2de62136
font_01_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 6012 bytes
SHA-256: a2324497e7acb8a6a93e4ac3da2394d8c47fbe1cbc52abf7f6e7390da38373ee
font_02_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 10844 bytes
SHA-256: eb1747cb3218f8039c3874af87bfd3a46a7fbc0cf66141080ea3e75f8851ae3a

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