Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de401791f773350…

MALICIOUS

PDF

41.7 KB Created: 2020-03-27 03:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 38a6d47d461b914c4fa73aee35cb37de SHA-1: 12c9fff9ba53ac5f6b700ab8522495461f605cbd SHA-256: 2de401791f773350b6475e8484d0a7003980b1fcdfd9f8459274e49c7dbac637
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though garbled, includes a URL that is also present in the list of extracted URLs. This suggests the primary purpose is to redirect users to a network of linked PDF files, likely for SEO spam or to host malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://pbjconstructionllc.com/uploads/1/3/1/0/131070846/131070846.html#fast+metabolism+diet+recipes+pdf
    • http://mermaidicamusic.com/uploads/1/3/0/5/130543198/gisatazaxineri-gapuwapom-totamuperivezu-gidinipalaxatav.pdf
    • http://mta-sts.mail.vbtherapist.com/uploads/1/3/0/7/130776143/1072499.pdf
    • http://lambsautosales.com/uploads/1/3/0/9/130969297/pivenetikegolul-gaxereboladupuk-zojixar.pdf
    • http://rambosiu.com/uploads/1/3/0/3/130323461/4192558.pdf
    • http://youloveto.shop/uploads/1/3/0/6/130604887/pawubudik.pdf
    • http://saraemeissner.com/uploads/1/3/0/2/130288391/85b01be6c6653.pdf
    • http://willmonkslighting.com/uploads/1/3/0/5/130552106/1b90b.pdf
    • http://manjilaboratory.com/uploads/1/3/0/4/130435746/fiwavane.pdf
    • http://bestoftamarindo.com/uploads/1/3/0/6/130604864/9976211575.pdf
    • http://mail.onecoopedchick.com/uploads/1/3/0/5/130545753/gewugotu_dimujojowog_sasedegaraxoxa.pdf
    • http://kellykirkpatrickmft.com/uploads/1/3/1/0/131071067/wekaxaxep_katefafe.pdf
    • http://katherinedale.net/uploads/1/3/0/5/130539054/molozur-tizifume-mevefok.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007abf.bin
969e2ebbc90018ba28f0531af75572c6a5319bbb5ae0a4f48fccba29d88373f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 8112 bytes

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