Malicious PDF — malware analysis report

Static analysis result for SHA-256 018156efa4f86fef…

MALICIOUS

PDF

37.8 KB Created: 2020-05-19 00:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b1191be316c06342d899b4d293fbca8 SHA-1: dbf9701caf5724256674b1ab6d0fb00ab4d32fab SHA-256: 018156efa4f86fefba173e30f7ae4aa2c87e541ea22497d653ffce46fabdf539
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs likely lead to further malicious content or phishing pages, and the document's structure suggests an attempt to manipulate search engine results or distribute malware through a link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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 http://navice.org/uploads/1/3/1/1/131164260/131164260.html#gurudwara+in+new+jersey
    • http://plateauvalleytimes.com/uploads/1/3/0/5/130550790/tuwiramupopu_dudirijimojo_sojut.pdf
    • http://martinsgoldens.com/uploads/1/3/0/7/130775737/7173062.pdf
    • http://jessebjorkmanforassembly.com/uploads/1/3/0/2/130270901/xevabutem-bimujilikeduj-wujoseju-mezatafumod.pdf
    • http://teamthunderok.com/uploads/1/3/0/6/130621636/3680876.pdf
    • http://m2d-design-interieur.com/uploads/1/3/1/4/131438345/8065ff5.pdf
    • http://thehappyfoodie.com/uploads/1/3/1/4/131413550/6190365.pdf
    • http://wondersinportugal.com/uploads/1/3/1/3/131380251/kepapekazus.pdf
    • http://asperaarchitects.com/uploads/1/3/1/4/131437198/7256625.pdf
    • http://kidsvestjacket.com/uploads/1/3/1/3/131383665/wimub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067fb.bin
1248162ccf4fa03626c11de01b742af26a5de73c4fba41f5cef8b0e7ecd1e027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 10268 bytes

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