Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf39fa4254f3819…

MALICIOUS

PDF

39.3 KB Created: 2020-04-02 04:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 145869fb97f589aa49a1c5ecf696ef99 SHA-1: 6b68c8190c3ac72d2b50bcf5aea34587b9d0ee6d SHA-256: fdf39fa4254f3819d01deffc43af67387837397e114ee6d124f9865e348d31fe
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, many of which follow a pattern of numeric slugs and are hosted on newly registered domains, indicative of a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to software downloads. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

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://garlicinfo.com/uploads/1/3/0/3/130324050/130324050.html#scansnap+s510+windows+10+64+bit
    • http://konidarisart.com/uploads/1/3/0/6/130621282/vujixorodifogimizi.pdf
    • http://farmwifelifend.com/uploads/1/3/0/6/130621226/fbd93861cf94.pdf
    • http://fabojer.store/uploads/1/3/0/2/130272462/xitirefi.pdf
    • http://c21sweyerrealestatecareer.com/uploads/1/3/0/2/130287894/xebolukaxunexi.pdf
    • http://cvillefamilyhistorycenter.org/uploads/1/3/0/6/130620364/mijolutaxolalasijiv.pdf
    • http://cannachris.co/uploads/1/3/0/7/130740547/lurabo.pdf
    • http://pedstudio.org/uploads/1/3/0/5/130550667/9879264d237746.pdf
    • http://4midableimagery.com/uploads/1/3/0/5/130539053/tuxutigoruzavir_ripemuxe_zoweputi.pdf
    • http://luckyknives.com/uploads/1/3/0/6/130620909/vojizet.pdf
    • http://uaeinsurancepolicy.com/uploads/1/3/0/5/130543190/badiniwobeliniti.pdf
    • http://jawsuit.com/uploads/1/3/0/8/130874086/8020702.pdf
    • http://chalkituptohope.com/uploads/1/3/0/2/130287839/677b42ba4.pdf
    • http://mesamessenger.com/uploads/1/3/0/8/130813966/wesidaxewadixedon.pdf
    • http://patriotsoap.us/uploads/1/3/0/8/130814731/752361702442c3.pdf
    • http://ms-wendys-class.com/uploads/1/3/0/6/130604445/sebile.pdf
    • http://bangalorepost.org/uploads/1/3/0/2/130289241/sajif.pdf
    • http://shippex.es/uploads/1/3/1/0/131070619/26194d.pdf
    • http://le-manuel-du-tage-mage.fr/uploads/1/3/0/2/130288600/noputojupedageja.pdf
    • http://declareservices.com/uploads/1/3/0/6/130620326/8596378.pdf
    • http://demoteyourdoubt.com/uploads/1/3/0/7/130775831/xuvavebom-kizobodifi-bopobukobu-juzijapud.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_off00006e8e.bin
7b29ca2a264f60e2f30a18243cc78303c48fc082ce2a334ec048c4aeb4e35ebf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 8552 bytes