Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68b2f2c23494e14…

MALICIOUS

PDF

33.6 KB Created: 2020-06-06 05:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5e601bb4368f160179c5b47d26601c7 SHA-1: 9ba172ac024d8d591b38414ce9e57389e700c19d SHA-256: a68b2f2c23494e146dbdfac82898eecffc2cb4966c12ba6ca4be736b935ee1d2
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of external links, many of which point to suspicious domains. The PDF_SEO_LINK_FARM heuristic indicates a link farm, suggesting the document's primary purpose is to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted, but the extensive linking pattern is indicative of a malicious SEO or redirection campaign.

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://jodiemarlow.yoga/uploads/1/3/0/7/130775763/130775763.html#perrenoud+p.+%25282004%2529.+diez+nuevas+competencias+para+ense%25C3%25B1ar.+m%25C3%25A9xico+sep
    • http://victoriabrowneholistics.co.uk/uploads/1/3/0/8/130874350/fakaxoru.pdf
    • http://errandgirlignacio.com/uploads/1/3/1/0/131070351/lutoj.pdf
    • http://arpsecure.com/uploads/1/3/0/6/130604952/4032af98a165a8.pdf
    • http://capitalsoluble.com/uploads/1/3/0/7/130775612/kikokukaxos.pdf
    • http://janixcateringllc.com/uploads/1/3/0/7/130775748/fcdcb68a13.pdf
    • http://tacwest.ca/uploads/1/3/1/3/131398401/8338944.pdf
    • http://magickalelements.com/uploads/1/3/1/6/131606396/9423838.pdf
    • http://kdconstructionllc.net/uploads/1/3/0/4/130488217/piwaxazaxovupokor.pdf
    • http://jodiemarlow.yoga/uploads/1/3/0/7/130775763/terms.html
    • http://jodiemarlow.yoga/uploads/1/3/0/7/130775763/dmca.html
    • http://jodiemarlow.yoga/uploads/1/3/0/7/130775763/policy.html
    • https://rurinume.files.wordpress.com/2020/06/talogizoxagikeminaxazud.pdf
    • https://ketoseginosi.files.wordpress.com/2020/06/87406982140.pdf
    • https://bokisutedex.files.wordpress.com/2020/06/wokemitoniliriju.pdf
    • https://mudosezu.files.wordpress.com/2020/06/jevisipinabafexegaxew.pdf
    • https://sinegimagex.files.wordpress.com/2020/06/zokozudawogagixuj.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_off0000535f.bin
fd3bd5b9ef4d6bbeed8332acd1072a5ead8cd40d8077127c376479f4ff574545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535F 11036 bytes

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