Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c7bdd700de08fd…

MALICIOUS

PDF

42.3 KB Created: 2020-05-16 19:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68925decdb330384ac063f9a4f3afd39 SHA-1: 01002583f1d56676b7768d443ec105d82a08c5e0 SHA-256: 03c7bdd700de08fd29ed217bd91423f314fe88f7d8f23e9c8fd6e4a38600b439
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, also contains URLs. These links likely serve to redirect users to malicious websites or to manipulate search engine results, a common tactic for SEO spam or phishing campaigns. No scripts were extracted, and the primary malicious activity observed is the distribution of numerous external links.

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://yahmonhemp.com/uploads/1/3/0/6/130620389/130620389.html#probation+violation+report+example
    • http://ynezjohnston.art/uploads/1/3/0/5/130588296/ee40a14ea.pdf
    • http://kimcollectstudio.com/uploads/1/3/0/5/130588762/1330392.pdf
    • http://tailgate4dogs.net/uploads/1/3/1/4/131453630/gexivize.pdf
    • http://greatergoodsteam.com/uploads/1/3/0/6/130639678/3186779.pdf
    • http://hrestor.com/uploads/1/3/0/4/130488754/8195493.pdf
    • http://ucberkeleycounseling.com/uploads/1/3/1/6/131606963/dudolidir_kukapudipovu_dedaxigomi.pdf
    • http://tilthefitladysings.com/uploads/1/3/0/6/130604693/9274410.pdf
    • http://januaryrosephotography.com/uploads/1/3/0/6/130639896/gepegekusewopez_vepufunudi.pdf
    • http://vriesea.com/uploads/1/3/1/8/131856105/tizemewewevet-kizidumobifava-fewokuzobo.pdf
    • http://mackaymaintenances.com/uploads/1/3/1/4/131482866/pupoz.pdf
    • http://cutenesscovered.com/uploads/1/3/0/7/130739632/powiduzeseruvonawa.pdf
    • http://scentofliving.com/uploads/1/3/0/6/130639928/91d59.pdf
    • http://clin-foci.com/uploads/1/3/1/4/131454178/kapadoj.pdf
    • http://chefsamueldux.com/uploads/1/3/0/5/130550785/909759.pdf
    • http://flyingfalconnews.com/uploads/1/3/0/6/130620689/vesamujef.pdf
    • http://beerandliquorstore.com/uploads/1/3/0/4/130476859/xozujipofusixesesem.pdf
    • http://takedownbullying.com/uploads/1/3/0/7/130776726/64120d0.pdf
    • http://buscoabogadobueno.com/uploads/1/3/0/6/130640021/009f855b09e.pdf
    • http://visualimpactlandscaping.com/uploads/1/3/1/4/131454207/wapada-xofibexari-dojapi-fimez.pdf
    • http://miss-stevens.com/uploads/1/3/0/9/130969186/jadewuku.pdf
    • http://nerdendo.com/uploads/1/3/0/4/130476351/2791344.pdf
    • http://momentshappen.com/uploads/1/3/0/4/130490928/mekodurasori.pdf
    • http://apexmiddleband.com/uploads/1/3/1/8/131871593/7f0742039ab5.pdf
    • http://highcountryav.com/uploads/1/3/0/5/130539265/25d57c1.pdf
    • http://huronmushrooms.com/uploads/1/3/0/6/130604401/kopem_tumimiwepipuwo_gafitaluta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007adf.bin
97d477e7867a7eef20fc4b566dce6c717d0b0d872db39451725388932460d403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADF 10000 bytes

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