Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc0ab4ffef771ed…

MALICIOUS

PDF

36.6 KB Created: 2020-04-10 05:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f53057dd3a749d835b5ae5ca1e4911ba SHA-1: 49f124d753f240ea10b645c74dc9b5c3b85fe420 SHA-256: 1cc0ab4ffef771edcb0cdc9e49c7ef5c0ef26dd6897b76c047cfe319b3be0be8
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. 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://tcsonline.net/uploads/1/3/0/2/130289246/130289246.html#main+idea+vs+theme+sort
    • http://heartlandapparel.org/uploads/1/3/1/6/131637037/vokawikejumujozad.pdf
    • http://movetounicoicountytn.org/uploads/1/3/0/2/130291523/suvivupopima.pdf
    • http://soonielandschoot.com/uploads/1/3/0/5/130588827/jajawipuzew-gezomifexefet-tabapiv.pdf
    • http://brothersbychoicefilm.com/uploads/1/3/0/7/130776850/7089445.pdf
    • http://emergency-plumber.com/uploads/1/3/0/4/130483587/wagokavuzonem.pdf
    • http://gulfwave.net/uploads/1/3/0/6/130605426/gufiwuwamoba.pdf
    • http://yukonpix.com/uploads/1/3/0/6/130640223/tovowafesabu_begewano.pdf
    • http://thisisvo.com/uploads/1/3/0/6/130605314/gevifogorot.pdf
    • http://kevinapabst.com/uploads/1/3/1/4/131413040/nufazexetadinep_rewib_moboperi_bakalevawe.pdf
    • http://nychooloflaughteryoga.com/uploads/1/3/0/6/130620265/kegezo-boderinexuzelaj-nowofopobubet-garumajofufoza.pdf
    • http://mayfairandcompany.com/uploads/1/3/1/6/131637953/lemaseneg_sigemizi_neserazefuneter.pdf
    • http://killernailzzz.com/uploads/1/3/0/7/130775694/2831fb794e48efb.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_off0000672b.bin
8def4e8e2ec75a51a5db6655f76fa36133cf17d616526b3f5d809544f4659448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672B 7844 bytes

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