Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44107ee133da2dc…

MALICIOUS

PDF

41.0 KB Created: 2020-03-07 14:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16530068c8f0a83d18030b8e4764f214 SHA-1: ce05d060cc394dc6cc636000a4cec9dc58cb1aa2 SHA-256: f44107ee133da2dc184bb959212741923389b7901ab7fde178f9b31c99284ca9
94 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents hosted on various domains. The primary URL points to a page discussing the effects of alcohol, likely a lure to disguise the malicious intent. The PDF_SEO_LINK_FARM heuristic firing strongly indicates this is part of a network designed to generate traffic or redirect users to potentially malicious 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://taiyangchengzongdaili.br3h.com/uploads/1/3/0/6/130639537/130639537.html#describe+the+short+term+effects+of+alcohol+on+the+following+body+systems
    • http://kunalsen.org.uk/uploads/1/3/0/6/130621331/3a2d5160601.pdf
    • http://al-cooley.com/uploads/1/3/0/7/130739837/pezepimomedato.pdf
    • http://www.ppgreentnj1.com/uploads/1/3/0/7/130738841/sipurogep-filodisiril-lexafuzozugeno-vurelusevu.pdf
    • http://happyliferetreats.com/uploads/1/3/0/6/130620467/6cef31c23bc30a4.pdf
    • http://michaelrekas.com/uploads/1/3/0/3/130312925/xukadiganiz.pdf
    • http://www.youngatartmn.com/uploads/1/3/0/5/130540280/lusebejixab.pdf
    • http://hotpriceparts.com/uploads/1/3/0/2/130289333/380ddcfcd109.pdf
    • http://bandstreamtv.com/uploads/1/3/0/2/130273812/womuk.pdf
    • http://amarismedical.net/uploads/1/3/0/2/130271102/fopidogawejogodole.pdf
    • http://iplusj.com/uploads/1/3/0/2/130287995/c680dd8421b.pdf
    • http://mail.endofnovelty.com/uploads/1/3/0/8/130873735/rogodofodepizi-zumojizemod.pdf
    • http://missionpeakrobotics.com/uploads/1/3/0/3/130379311/guvirewafowos_buvavol.pdf
    • http://pegasusmalibu.com/uploads/1/3/0/4/130435602/fe5a667.pdf
    • http://gumballwall.com/uploads/1/3/0/5/130590496/6344996.pdf
    • http://www.kitsapcountypsychic.com/uploads/1/3/0/6/130639574/184614.pdf
    • http://nancytoofani.com/uploads/1/3/0/6/130639842/kimanul.pdf
    • http://www.coffeecalligraphy.com/uploads/1/3/0/7/130739379/buziwowaruxejiw.pdf
    • http://leftproject.org/uploads/1/3/0/5/130588964/1667089d0e7.pdf
    • http://www.peasantandsparrow.com/uploads/1/3/0/4/130483981/jadupufa.pdf
    • http://layanshaheen.com/uploads/1/3/0/7/130776223/1104720.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_off0000795e.bin
104e835a642723f94d203b7ec29a342a90c2fd66c55848ef635f5272c78b854f
pdf-font-stream PDF embedded font (sfnt) at offset 0x795E 7176 bytes