Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e8abd980c402ab…

MALICIOUS

PDF

37.9 KB Created: 2020-05-17 01:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a83abafde4a6287db20be2d36c7c58a SHA-1: 2e213ec3ea993e2f8d8eb1b261409169ea26979a SHA-256: 43e8abd980c402ab56c1c66d75a37fc7244b9147a6d60d7300ca0bf17734a0f6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF document contains a large number of external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct payload execution.

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://saranlpcoach.com/uploads/1/3/0/3/130379078/130379078.html#booklet+format+in+word
    • http://lthousestudio.com/uploads/1/3/0/9/130968933/ginubawagel_womulepukirilod.pdf
    • http://lilpurdy.com/uploads/1/3/0/6/130620547/ruwewijibuxulaw.pdf
    • http://appentis.fr/uploads/1/3/0/7/130775705/ruroped-jawebut-zesevixofewipo.pdf
    • http://dirtypurdy.com/uploads/1/3/0/2/130272377/54622d5f6896f0f.pdf
    • http://hotheadsrock.com/uploads/1/3/1/1/131163890/tanojusoxuveno-bizomoxum-tibebo-wujeda.pdf
    • http://erkigroup.com/uploads/1/3/0/5/130551586/tukudogumosab.pdf
    • http://bling4babies.com/uploads/1/3/0/3/130313115/40b7d8989.pdf
    • http://alwaysfuntravel.com/uploads/1/3/0/7/130740175/5280200.pdf
    • http://kellyschwegelconsulting.com/uploads/1/3/0/5/130540897/4ccdc9662691a4.pdf
    • http://higherimage.org/uploads/1/3/0/3/130323181/ripifupis-bosaxotujuna.pdf
    • http://envsource.org/uploads/1/3/1/4/131438225/6d173a8b428.pdf
    • http://janeeyre-design.com/uploads/1/3/0/6/130640013/pezokigabafofur-bekodizu-bilevuzez.pdf
    • http://compasscounselingsa.com/uploads/1/3/0/2/130289577/308209bdf85bbdf.pdf
    • http://lucidcitymusic.com/uploads/1/3/0/2/130291809/df745b38e6a78c.pdf
    • http://darnellduoattentivecaring.com/uploads/1/3/0/6/130640105/2953162.pdf
    • http://abcphoenix.com/uploads/1/3/1/6/131606482/nilowelivuxo-jugudusetekofew-lupobelukozo.pdf
    • http://knowthefactsvape.com/uploads/1/3/0/5/130551739/f184b0d00c840.pdf
    • http://legoformer.us/uploads/1/3/0/8/130813117/7632017.pdf
    • http://fieldofopportunities.com/uploads/1/3/0/4/130488569/4571633.pdf
    • http://hurricaneenterprise.com/uploads/1/3/0/3/130323295/lofov.pdf
    • http://endhatenow.net/uploads/1/3/0/2/130272600/dukof-wesivizudet-xiguzimobinos-zewev.pdf
    • http://carwash-brushes.com/uploads/1/3/0/3/130323161/5923438.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_off00006a4f.bin
02a5464daf3273936f384113e4601e0949f5e0dc53eaf66f5892bccda84fa636
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 9840 bytes