Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8921736e73e4fae…

MALICIOUS

PDF

34.5 KB Created: 2020-05-15 02:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 70358e54e6e598bd37bc14f6aaddcfe4 SHA-1: c04f1f3b20e45fb66c5888385c606ddad812ba02 SHA-256: e8921736e73e4fae1b19ae760690ba9b186a10d7dcf1fc32e6431c921f47ab1c
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic to drive traffic to potentially malicious content. The embedded document body text, though heavily corrupted, contains references to 'macos catalina iso virtualbox' and URLs, reinforcing the lure. No scripts were extracted from this sample.

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://kuerptyltd.com/uploads/1/3/0/6/130620716/130620716.html#macos+catalina+iso+virtualbox PDF link annotation
    • http://ripnrollrugs.com/uploads/1/3/1/3/131384301/3407996.pdfIn PDF document text
    • http://coplandia.com/uploads/1/3/1/4/131438500/pobemavapegowelarine.pdfIn PDF document text
    • http://twowheelpickerbicycleshop.com/uploads/1/3/1/3/131379706/3421723.pdfIn PDF document text
    • http://beatrizgonzalezmusic.com/uploads/1/3/1/8/131856402/9939155.pdfIn PDF document text
    • http://faszination-gewalt.com/uploads/1/3/0/2/130271042/ac33f262d30eb.pdfIn PDF document text
    • http://1815cio.org/uploads/1/3/0/4/130483990/1650326.pdfIn PDF document text
    • http://franklinppnews.org/uploads/1/3/0/4/130483110/9596875.pdfIn PDF document text
    • http://jayohphotography.com/uploads/1/3/1/4/131410234/a4470b729cf788.pdfIn PDF document text
    • http://sweetlysugared.com/uploads/1/3/0/6/130620704/5f90842.pdfIn PDF document text
    • http://amd11z.com/uploads/1/3/0/5/130590243/nexisonanorefi-metamowado-baboni-manisu.pdfIn PDF document text
    • http://bonhamshouse.org/uploads/1/3/0/6/130621298/1806b.pdfIn PDF document text
    • http://ladieslearnenglish.com/uploads/1/3/1/4/131454549/teredujojetebalobaki.pdfIn PDF document text
    • http://chrisglover.org/uploads/1/3/0/6/130603673/8207436.pdfIn PDF document text
    • http://prettyproto.com/uploads/1/3/0/6/130603740/xajomid_wakadane.pdfIn PDF document text
    • http://galleryeda.com/uploads/1/3/0/5/130589156/a24781.pdfIn PDF document text
    • http://emmajamesboutique.shop/uploads/1/3/0/5/130540063/zanodoxekereket.pdfIn PDF document text
    • http://deninteractives.com/uploads/1/3/1/8/131871762/4967275.pdfIn PDF document text
    • http://healthandaccountability.com/uploads/1/3/0/6/130640239/gukamek-kexivedusi-zixexuzogup-xoxupu.pdfIn PDF document text
    • http://texasdeaths.com/uploads/1/3/0/3/130324248/novusamaripar.pdfIn PDF document text
    • http://sonicfibre.com/uploads/1/3/1/3/131379384/ridozo-ratekivarivux-risup-guwezevabul.pdfIn PDF document text
    • http://delilahfayeart.com/uploads/1/3/0/8/130813663/sozidosigaxexa_noverobop.pdfIn PDF document text
    • http://piersongardenandlandscape.com/uploads/1/3/1/3/131383761/ccb5c7d9cc27.pdfIn PDF document text
    • http://thezebrawall.com/uploads/1/3/1/4/131437728/9432059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDD 9668 bytes
SHA-256: 3fb992485aa61dfc261380e0d2658ab1010eb000cd6377fdb106f12b6cdccb9f

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