Malicious PDF — malware analysis report

Static analysis result for SHA-256 b169258ae0d01fad…

MALICIOUS

PDF

36.4 KB Created: 2020-04-01 21:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e155beba28188f12f3688bb15f8ab018 SHA-1: 6624a907a3c474b71c4bf65e32245e087497b321 SHA-256: b169258ae0d01fad839fadcc2249b419e3275283b2d79718378dfd50b06304aa
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, a technique commonly used for SEO poisoning or traffic redirection. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains references to URLs that are part of this link farm. No scripts were extracted from this sample.

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://escorti-milano.com/uploads/1/3/0/7/130740356/130740356.html#the+scrapyard+home+decoration+guide
    • http://eypehouse.com/uploads/1/3/1/3/131383251/6760cd.pdf
    • http://moleteaworks.org/uploads/1/3/0/6/130605119/dajametugijapo.pdf
    • http://jasonbondpumps.com/uploads/1/3/1/1/131163514/tosejifuwulopet.pdf
    • http://lafayetteflatsretreat.com/uploads/1/3/0/5/130551534/bulirakobu_nitama_dimobixof_jisasoxok.pdf
    • http://affairsbykim.com/uploads/1/3/0/5/130551607/8210838.pdf
    • http://bfaog.com/uploads/1/3/0/4/130476492/5fcdca.pdf
    • http://sexywithclassmagazine.com/uploads/1/3/0/6/130639282/lobez-dixawanop.pdf
    • http://dalestravel.info/uploads/1/3/0/3/130380084/3197891.pdf
    • http://rodneyreedbailbonding.org/uploads/1/3/0/3/130312920/ca5e06d4cb3bc0.pdf
    • http://herefordseptic.com/uploads/1/3/0/8/130874467/kovulup_fikogozinexano_zupeni.pdf
    • http://benthepirate.com/uploads/1/3/0/5/130550848/dudozojenofu.pdf
    • http://the-first-choice-travel.com/uploads/1/3/0/4/130483343/tuvabudunuvo-veraka-doduzafixasaj.pdf
    • http://athenealam.com/uploads/1/3/0/4/130483587/didenamajidikofomize.pdf
    • http://rendezvousformalwear.com/uploads/1/3/0/6/130639551/ba086a04cb75186.pdf
    • http://clintonstudio54.com/uploads/1/3/0/4/130483949/dfd2a95a286b.pdf
    • http://roomtodream.net/uploads/1/3/0/4/130490245/2151849.pdf
    • http://thetimebetweenis.org/uploads/1/3/1/4/131406390/pokol.pdf
    • http://diamondsuppliments.com/uploads/1/3/0/9/130969056/zetexetujonez.pdf
    • http://loomfabricsonline.com/uploads/1/3/1/0/131070027/zugajageziviso_nepotin_bavajul_falavidid.pdf
    • http://juaniecevbair.com/uploads/1/3/1/1/131164153/dopej.pdf
    • http://elanabode.com/uploads/1/3/1/1/131164112/wosuvus-sunodamozewomam-dupapiporoziju.pdf
    • http://byblair.co/uploads/1/3/1/4/131407235/xinawulalufaj-luvatomawu-fukiluwateto-fojurajagaf.pdf
    • http://beckyssugarbabies.com/uploads/1/3/0/7/130738803/maruro_rupov_xegemiba_xatosozunil.pdf
    • http://helpingheroessupport.org/uploads/1/3/1/3/131380754/wazujotuloge-tuzad.pdf
    • http://beckyssugarbabies.com/uploads/1/3/0/
    • 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_off00006716.bin
c5f0a2ad85cffaf8f3249819f020816ebf0d4aad7ee80eb85c3cdb2be9bf0cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 7312 bytes

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