Malicious PDF — malware analysis report

Static analysis result for SHA-256 a054889003eda2fa…

MALICIOUS

PDF

41.1 KB Created: 2020-03-27 11:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 504eb029d1258e7edfe0d73eefe4c5f9 SHA-1: b09572219bcddcb4ba9b4c9f5ecc28cad76aeca2 SHA-256: a054889003eda2fa4066f9637948ffdd4e5d8d0b28ee93a326fae59a3106c700
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to distribute or host harmful content across multiple domains. The document body contains garbled text and references to 'wkhtmltopdf', suggesting it was programmatically generated.

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://sigmafinancegroup.com/uploads/1/3/0/8/130874201/130874201.html#56+de+la+tabla+peri%C3%B3dica+metales PDF link annotation
    • http://responsdirect.no/uploads/1/3/0/8/130873996/sajanukovemoli.pdfIn PDF document text
    • http://www.bearnecessitiesworkshop.com/uploads/1/3/0/4/130489696/5287683.pdfIn PDF document text
    • http://sanstuticlasses.com/uploads/1/3/0/8/130874265/4131558.pdfIn PDF document text
    • http://colossal.vip/uploads/1/3/0/6/130605094/3226192.pdfIn PDF document text
    • http://conquercoffee.com/uploads/1/3/0/7/130740610/4962755.pdfIn PDF document text
    • http://justfurlovers.com/uploads/1/3/0/4/130436224/kukazibumodoziz.pdfIn PDF document text
    • http://kazanamaz.net/uploads/1/3/0/5/130541065/ninipatojunomir.pdfIn PDF document text
    • http://seasonforcourage.com/uploads/1/3/0/7/130775904/solotanizuxodivepoxe.pdfIn PDF document text
    • http://roofinginpinellas.com/uploads/1/3/0/6/130604040/negugovuda.pdfIn PDF document text
    • http://www.paofbi.org/uploads/1/3/0/9/130969206/vasifalewapum-xanifaxunefot-pixazegawe.pdfIn PDF document text
    • http://www.tigerlilyaffair.com/uploads/1/3/0/8/130874645/mawixodud_xikovidip_ludibib.pdfIn PDF document text
    • http://scripttoscreenplay.com/uploads/1/3/0/4/130489128/zisujetonowabagare.pdfIn PDF document text
    • http://themajaball.com/uploads/1/3/0/7/130775252/2235870.pdfIn PDF document text
    • http://handmadegrain.com/uploads/1/3/0/6/130604752/0baf8e9f0e.pdfIn PDF document text
    • http://nles-boutique.com/uploads/1/3/0/6/130604780/budanevodid-kusabub.pdfIn PDF document text
    • http://theyarn.shop/uploads/1/3/0/7/130738969/sesoperufogexo.pdfIn PDF document text
    • http://raccoonremovalcharleston.com/uploads/1/3/0/4/130477135/1169254.pdfIn PDF document text
    • http://solidaritymaryland.org/uploads/1/3/0/4/130435684/parosupit.pdfIn PDF document text
    • http://djaccountingservices.com/uploads/1/3/1/4/131406722/tetus.pdfIn PDF document text
    • http://mommieceoapparel.com/uploads/1/3/0/2/130289543/8132015.pdfIn 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

Related samples 2

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_off00007446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7446 8912 bytes
SHA-256: 4cfc27c6f36f6c60229f43bcaa1c153033d8c57471e61437cf40660d5760d5e9

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