Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fab41f161e0228…

MALICIOUS

PDF

39.1 KB Created: 2020-03-20 06:38:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 07d05d59837b2f6af9a32ce6a402c982 SHA-1: 88792498ad655a33935a0231deadc37c401e209e SHA-256: a2fab41f161e0228b56cc2254ea4d7069ba8449da98e6295539ec79714dc1730
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains text related to financial reporting and also includes URLs. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of linked websites, likely for SEO spam or to host further 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://hello-baby-toys.com/uploads/1/3/0/6/130639599/130639599.html#chapter+7+auditing+internal+control+over+financial+reporting
    • http://krisztiansandidge.com/uploads/1/3/0/7/130738892/femozegu-netazox-gomuxubobikad-kewiximimelom.pdf
    • http://just1created.com/uploads/1/3/1/0/131070325/8848119.pdf
    • http://jenniferlwells.com/uploads/1/3/0/5/130590111/8098330.pdf
    • http://nihaosky.com/uploads/1/3/0/6/130605112/9ae875da0dcd.pdf
    • http://www.renewport.org/uploads/1/3/0/4/130436207/zabodisugewome_gejiguvet.pdf
    • http://wendyvangent.com/uploads/1/3/0/8/130874573/150705b57.pdf
    • http://www.beastski.org/uploads/1/3/0/4/130489051/nadezus_nozivexodekewof.pdf
    • http://webmail.lullabylinks.com/uploads/1/3/0/5/130588396/217adaab7801.pdf
    • http://nerdlebanon.com/uploads/1/3/0/2/130289317/molusewib.pdf
    • http://sopoochtraining.com/uploads/1/3/0/3/130323381/9054816.pdf
    • http://www.baumanbaps.com/uploads/1/3/0/6/130621506/jabuwamumeguximilese.pdf
    • http://sugarmaplecharcoal.com/uploads/1/3/0/6/130620745/vipin.pdf
    • http://theunderwoodsforestfarm.com/uploads/1/3/0/4/130477351/0f03bd7c.pdf
    • http://margiemademe.com/uploads/1/3/1/0/131070207/ed72fd4779d.pdf
    • http://poulsborvfife.com/uploads/1/3/0/6/130604366/pukekilis-kukidumazuxine-vajaniviki-vijanudetej.pdf
    • http://www.renegatx.hu/uploads/1/3/0/5/130588865/gekijijuxiwowe-lasenemo-nobarok-jebisup.pdf
    • http://jeanbernardruhf.com/uploads/1/3/0/7/130740142/farunukomiwil_dezajimesoguwo_mimafokadurino_gazowugubivawam.pdf
    • http://charedianonimy.com/uploads/1/3/0/9/130969934/gubugilu-susabelupa.pdf
    • http://waitvision.com/uploads/1/3/0/7/130775402/radarutum.pdf
    • http://www.bmontgomerylaw.com/uploads/1/3/0/4/130435638/kilav.pdf
    • http://tigerlilyyoga.com/uploads/1/3/0/7/130776611/4612059.pdf
    • http://bpccvt.com/uploads/1/3/0/7/130740072/sekuxijidomezeno.pdf
    • http://creatables.ca/uploads/1/3/0/4/130435702/kupenosatole-womonapimop-dijezin.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_off000071c4.bin
1f8d77d6f760b4855ff954c80348d2f4b5cebb1d1c2b6c240124d35a74980e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 7216 bytes

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