Malicious PDF — malware analysis report

Static analysis result for SHA-256 88661914d5aaf7b0…

MALICIOUS

PDF

90.9 KB Created: 2020-03-31 11:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 24a3039bae801eeed9acbc887b34f562 SHA-1: 6eb05f39c79dba4fbd6dcc28d4a8209550b07c9d SHA-256: 88661914d5aaf7b02b9d0815e697bbb33c822375e0a43aac20e71dc81fe02557
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The embedded content, though heavily obfuscated, includes URLs that are likely part of a link farm or distribution network. This suggests the document's primary purpose is to redirect users to other malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://enerselect.net/uploads/1/3/0/8/130814851/130814851.html#how+many+atoms+of+an+element+are+in+a+compound
    • http://ilyasulima.com/uploads/1/3/0/6/130620745/a77c3.pdf
    • http://www.modernizetothrive.com/uploads/1/3/0/4/130483300/3262212.pdf
    • http://shananigansgifts.com/uploads/1/3/0/6/130640172/tirezufe-bomemopixegim-tawotexepeb-tifelik.pdf
    • http://newurbanways.net/uploads/1/3/0/6/130621461/6343368.pdf
    • http://christykill.com/uploads/1/3/0/7/130776148/nazugufubelowojojari.pdf
    • http://www.marcschuebellaw.de/uploads/1/3/0/5/130539235/5273848.pdf
    • http://passionrank.com/uploads/1/3/0/2/130270799/dapalul_xuweji_bolosipifez_takiwesagupu.pdf
    • http://edenwoodranchandpreserve.com/uploads/1/3/0/8/130814575/6118978.pdf
    • http://zone13tv.com/uploads/1/3/0/5/130588349/4369191.pdf
    • http://eclairtech.com/uploads/1/3/0/6/130639296/2306875.pdf
    • http://evilstepmoms.com/uploads/1/3/0/5/130544754/dejemo_kizikibuxenop_loxiberosonuza_fetidotomon.pdf
    • http://lagrancarpaatayde.com/uploads/1/3/0/6/130620966/vawobulevi.pdf
    • http://amberappleby.com/uploads/1/3/0/7/130739573/c50c47.pdf
    • http://worldcare.vip/uploads/1/3/0/4/130489958/1272851.pdf
    • http://renotahoearea.net/uploads/1/3/0/2/130289296/4942987.pdf
    • http://enteavecounselingservices.net/uploads/1/3/0/3/130379398/1983751.pdf
    • http://ebmccallanbuildingltd.com/uploads/1/3/0/5/130588802/6c573dffb5.pdf
    • http://coppercoreconsulting.com/uploads/1/3/0/7/130739430/5312716.pdf
    • http://rosetintedmama.com/uploads/1/3/0/4/130476171/9928048.pdf
    • http://bitcointresor.ch/uploads/1/3/0/8/130814176/tamewanamavu.pdf
    • http://strategichealthservicesllc.org/uploads/1/3/0/9/130969080/4923888.pdf
    • http://carpetcleanerkc.com/uploads/1/3/0/4/130436389/96d0f3558c0.pdf
    • http://changingfaceshairandmakeupartistry.com/uploads/1/3/0/6/130620625/ribafusaluse_pamunosejaduvu.pdf
    • http://simply-errands.com/uploads/1/3/0/5/130588724/9424279.pdf
    • http://makingmilk.org/uploads/1/3/0/6/130639916/kibopefigalurom.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_off00013afe.bin
14504cb02c06f5e49fc34666406491232c25ee28607bbf100972acfd1836c0c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFE 8252 bytes

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