Malicious PDF — malware analysis report

Static analysis result for SHA-256 d696ddbd38e922b8…

MALICIOUS

PDF

42.6 KB Created: 2020-05-24 02:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32525998d6e66447bff2a23166ecdede SHA-1: 349e89110c526f89e1583eb848470051cf98b9fe SHA-256: d696ddbd38e922b87164c429fa5443919dd99e670a1a1f6873b2e7f62775e5e0
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, to other PDF files hosted on various domains. This indicates a link farm or SEO spam tactic designed to drive traffic or manipulate search engine rankings. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://x0597057xstreamtravel.xsideas.com/uploads/1/3/0/8/130814402/130814402.html#unicameral+vs+bicameral+pros+and+cons
    • http://rifemachine.info/uploads/1/3/1/4/131406361/tizeduzivev.pdf
    • http://grapefuldregs.com/uploads/1/3/0/9/130969658/904526.pdf
    • http://fantravl.eu/uploads/1/3/0/5/130551656/7168401.pdf
    • http://rcrgli.org/uploads/1/3/0/4/130483140/sididejemuv.pdf
    • http://hollandfotovideo.eu/uploads/1/3/0/7/130739731/49a570a812c752b.pdf
    • http://brucehock.com/uploads/1/3/0/8/130873759/561ca.pdf
    • http://jacobnrodriguez.com/uploads/1/3/1/4/131452837/mifafivi-robuzolajidusa-fisazo.pdf
    • http://aquaclearpx.com/uploads/1/3/0/4/130476454/7769915.pdf
    • http://afinatucintura.com/uploads/1/3/0/3/130324370/4685219.pdf
    • http://raisewellbeing.org/uploads/1/3/0/8/130874165/rupopatapajaxopa.pdf
    • http://derlysoluri.com/uploads/1/3/1/3/131398296/tafasuxexumil.pdf
    • http://myprizeonline.com/uploads/1/3/0/6/130639157/mitemerulejiv.pdf
    • http://tylerrydosz.com/uploads/1/3/1/1/131164122/3631558.pdf
    • http://aboutchelsea.org/uploads/1/3/1/3/131378975/895053982.pdf
    • http://printimaginations.com/uploads/1/3/1/8/131856108/5684841.pdf
    • http://211yolocounty.com/uploads/1/3/0/6/130603682/3c771407338210.pdf
    • http://karenannettetownsend.com/uploads/1/3/0/5/130590582/tomomosobupefo.pdf
    • http://woobrickbox.net/uploads/1/3/0/7/130740536/lolovivukine.pdf
    • http://tijuanamileniominarete.club/uploads/1/3/0/2/130288762/jobupeliwob-bowarikuredome-noxodiza-nofiponisufu.pdf
    • http://eyaamara.com/uploads/1/3/0/9/130969808/7ca53cbd.pdf
    • http://occiv.com/uploads/1/3/0/7/130775725/53c01bd2a4.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_off000079fe.bin
6ec1ee91d6f9aa8febb2989703b1486d609d2d876a05f66258a056e22d9e7166
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 10688 bytes