Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbdd01182c6531e3…

MALICIOUS

PDF

99.2 KB Created: 2020-06-06 03:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ddc8ffdaf0b78219fc9a14bdbd4b2b SHA-1: 5f81ac6aa3e3ce10664d7afa7532e35c3e8a0e71 SHA-256: cbdd01182c6531e30aa89aec44169983410774a5e93c2ba4e961144ce6570e03
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, characteristic of a link farm for SEO poisoning. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

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://atentbythecreek.com/uploads/1/3/1/3/131379343/131379343.html#smallville+season+1+episode+1+dailymotion
    • http://beelinemotorsports.com/uploads/1/3/0/6/130605299/44cc256092f5e.pdf
    • http://livestream.vlaanderen/uploads/1/3/1/1/131163729/zafaru-vemafasemu-fekodikolavamij.pdf
    • http://mta-sts.douglindsayreserve.com/uploads/1/3/0/7/130776118/dagiw-fofixe.pdf
    • http://bassittdesigns.com/uploads/1/3/0/5/130588315/jukinomisakuwab-wewedutokom-vepelon-petim.pdf
    • http://middle-age-needtochange-andscared-shitless.com/uploads/1/3/0/5/130539672/xisobur_mewopojexu_bifelegisesis_foremejomeba.pdf
    • http://cavapoocafe.com/uploads/1/3/0/8/130813420/3235453.pdf
    • http://auto-pneumatyka.pl/uploads/1/3/0/3/130313178/f963263a6c85ef.pdf
    • http://technologicaladvancesfordiabteics.com/uploads/1/3/0/7/130775383/cb38715f99.pdf
    • http://atentbythecreek.com/uploads/1/3/1/3/131379343/terms.html
    • http://atentbythecreek.com/uploads/1/3/1/3/131379343/dmca.html
    • http://atentbythecreek.com/uploads/1/3/1/3/131379343/policy.html
    • https://datarelozaw874436251.files.wordpress.com/2020/06/22750918076.pdf
    • https://rajubap.files.wordpress.com/2020/06/kijuzoxeni.pdf
    • https://tesovowato.files.wordpress.com/2020/06/87236965870.pdf
    • https://kekajonupuse84433623.files.wordpress.com/2020/06/jovuposawe.pdf
    • https://melexiv.files.wordpress.com/2020/06/58443423140.pdf
    • https://memibenamefu.files.wordpress.com/2020/06/64603953994.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_off00015312.bin
982eeee0844326618f70023bc97b2e3b364466cb83fd3cf0f01127a3fc6373bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15312 13632 bytes

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