Malicious PDF — malware analysis report

Static analysis result for SHA-256 68954dc6bbc6e871…

MALICIOUS

PDF

58.4 KB Created: 2020-03-07 15:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e23d50a6dfa6afb90b8d2b615dba326e SHA-1: 5efdd592ace9c823b583a223eb317894e363022b SHA-256: 68954dc6bbc6e8712a228c11e5743892c6dd9becbd6ed8b080a536a88de28633
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified as a link farm, which is a common technique for SEO manipulation or distributing malicious content. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly as part of a phishing or malware distribution scheme.

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://wcd-mx98whfv.mgh-r.ch/uploads/1/3/0/5/130540714/130540714.html#28+fundamental+beliefs+book+online
    • http://local-usalocksmith.com/uploads/1/3/0/2/130272554/5481793.pdf
    • http://spotlightphotos.net/uploads/1/3/0/4/130490915/8665549.pdf
    • http://steamboatevangelicalchurch.com/uploads/1/3/0/6/130621515/xivelapotezumunola.pdf
    • http://danegeneralcontractorsllc.org/uploads/1/3/0/5/130545565/siburapelu.pdf
    • http://onyadphoto.com/uploads/1/3/0/8/130874458/6427394.pdf
    • http://vehicleloanusa.com/uploads/1/3/0/5/130543050/gazubuvojigowe.pdf
    • http://prickleberrydesigns.com/uploads/1/3/0/5/130588343/moram.pdf
    • http://noclintonsnomore.com/uploads/1/3/0/6/130604848/gurijexobukepemaw.pdf
    • http://deadbeatbuddy.com/uploads/1/3/0/4/130488069/sisozokadififigowaj.pdf
    • http://mail.longfellowpta.org/uploads/1/3/0/5/130551239/4924805.pdf
    • http://www.tinytonythepony.co.uk/uploads/1/3/0/7/130775277/3892398.pdf
    • http://jarkkopartanen.com/uploads/1/3/0/2/130270790/rurasufujasaboviwumi.pdf
    • http://skeezyrat.com/uploads/1/3/0/7/130739154/596c68fa7e8e.pdf
    • http://crossroads-studio.net/uploads/1/3/0/8/130814584/basodexudi-pivonuzija.pdf
    • http://guitarhugs.com/uploads/1/3/0/6/130639165/2039635.pdf
    • http://pendulumprayers.com/uploads/1/3/0/6/130639440/sabapinu.pdf
    • http://agecompanyus.com/uploads/1/3/0/5/130588232/rarozepiweto.pdf
    • http://www.lazydaysbb.biz/uploads/1/3/0/5/130588266/b6b8463fe.pdf
    • http://quincyquarrymuseum.com/uploads/1/3/0/3/130323174/padupapeso.pdf
    • http://timeroll.com/uploads/1/3/0/4/130476342/xosak-tewozojaw.pdf
    • http://www.bettysmusic.com/uploads/1/3/0/4/130490193/moparaxariwevibowun.pdf
    • http://www.greenlite.club/uploads/1/3/0/6/130603852/838d6.pdf
    • http://flexosupply.com/uploads/1/3/0/6/130620320/6771026.pdf
    • http://plantaddict.shop/uploads/1/3/0/3/130323559/986050.pdf
    • http://greenparke2.com/uploads/1/3/0/6/130621447/4062320.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_off0000beaf.bin
47cd3a33f0fea9c822cd6844035eb6d591981b9c5bcce43e23b956a42e1f248e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAF 7228 bytes

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