Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac15f892ef0bfcb…

MALICIOUS

PDF

40.5 KB Created: 2020-04-04 08:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: f545be4b00eb9d627e11c25eec700614 SHA-1: 986517a5eab9e9a5b256c2e8c634cd8606da191f SHA-256: 1ac15f892ef0bfcb48d5f692323a2ad16ecfe8c09c196c9c7a8ef74e3f6176d4
136 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a link-building or spam campaign. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may be intended to trick users into believing they need a password to access an archive, a common tactic for disguising malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://timeframingconsulting.com/uploads/1/3/1/4/131437490/131437490.html#ver+peliculas+online+gratis+entrevista+con+el+vampiro PDF link annotation
    • http://flohsinn.com/uploads/1/3/0/5/130590739/2664d.pdfIn PDF document text
    • http://1ecsp.com/uploads/1/3/0/2/130272500/ecb380a2d6f.pdfIn PDF document text
    • http://aliabdelmohsen.com/uploads/1/3/0/9/130969430/9344135.pdfIn PDF document text
    • http://faszination-gewalt.com/uploads/1/3/0/2/130288818/tidijifaz-wosunok.pdfIn PDF document text
    • http://silk168.net/uploads/1/3/1/4/131409677/74add2af7065366.pdfIn PDF document text
    • http://termitescincinnati.com/uploads/1/3/0/8/130813143/nipegavufupawaj.pdfIn PDF document text
    • http://dariahmathews.com/uploads/1/3/0/5/130539074/vovuzepap.pdfIn PDF document text
    • http://livingsimplysavage.com/uploads/1/3/0/5/130551251/bawivekuvifozuw-totub-mamuriwatibub-fubulobesikixe.pdfIn PDF document text
    • http://gryphder.com/uploads/1/3/1/4/131406435/lajifexe-jokegal.pdfIn PDF document text
    • http://fmtimove.com/uploads/1/3/1/3/131398053/sigivo.pdfIn PDF document text
    • http://petesfishtales.net/uploads/1/3/0/8/130814238/afdc8.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 6728 bytes
SHA-256: 5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b
font_01_sfnt_off000074d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D0 8640 bytes
SHA-256: 917b61de3751d3de297b8e713e6a99e654faa055b567d1c8c711544a1cc8167e

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