Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a5d986fae01ba3…

MALICIOUS

PDF

34.8 KB Created: 2020-06-03 21:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bbb9e1f675a99fada87aa8894a0adfb SHA-1: 35ba98f4ec2e63a6e0a7b45953ce524ae82d6a22 SHA-256: 83a5d986fae01ba37d77c4434efbf3746133f3d09a6376f05d47fa50bc1fb42b
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a technique often used for SEO poisoning or to direct users to malicious sites. The document body mentions 'Rise of the Tomb Raider cheat engine', likely a lure to attract clicks. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The primary attack pattern involves directing users to external URLs hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://newenglandcamera.com/uploads/1/3/0/2/130288301/130288301.html#rise+of+the+tomb+raider+cheat+engine
    • http://alderfilmfestival.com/uploads/1/3/0/8/130873986/potusorowu-valoxi-nixubedisuru-nojilil.pdf
    • http://acetravels.voyagerwebsites.com/uploads/1/3/0/8/130873787/xidagemixu.pdf
    • http://qwertypictures.com/uploads/1/3/0/8/130873930/d1014f9976c.pdf
    • http://boardroominsightsconsulting.com/uploads/1/3/0/3/130313082/luwepulaxagumon_wasobovovozasif_motemutivus.pdf
    • http://newenglandcamera.com/uploads/1/3/0/2/130288301/terms.html
    • http://newenglandcamera.com/uploads/1/3/0/2/130288301/dmca.html
    • http://newenglandcamera.com/uploads/1/3/0/2/130288301/policy.html
    • https://limowuzeram.files.wordpress.com/2020/05/fovugezep.pdf
    • https://waxizonuv.files.wordpress.com/2020/06/39392499623.pdf
    • https://jiwefised.files.wordpress.com/2020/05/sojisosaduladomor.pdf
    • https://rufofuvokije.files.wordpress.com/2020/06/ponixutepariga.pdf
    • https://rufumeridap.files.wordpress.com/2020/06/44546301066.pdf
    • https://rufutekinose.files.wordpress.com/2020/06/15338087748.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_off00005ca0.bin
bb76874bac4935a09840b1c65fa4059c19d76df644d59c6f1bb9aa1a006f749c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 10584 bytes

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