Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddff32a134c6b2b6…

MALICIOUS

PDF

60.2 KB Created: 2020-05-16 03:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4d0d915c60a2f4c59fcb3da6139b2172 SHA-1: 90f03d67c8982faad4f92aab6c9856173c74f504 SHA-256: ddff32a134c6b2b6bcd86cb2ca7dce9f7798145dd61f433823e175f2cda7e135
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://timetimeyt.site/uploads/1/3/0/9/130969085/130969085.html#best+android+watch+waterproof PDF link annotation
    • http://peopledopilates.com/uploads/1/3/1/4/131406855/ritobuwiv_xofufa_mogirosaw.pdfIn PDF document text
    • http://laibeninsurance.com/uploads/1/3/1/4/131453177/36d86637.pdfIn PDF document text
    • http://centroamericadeinversiones.com/uploads/1/3/0/6/130604449/dijasipukobi.pdfIn PDF document text
    • http://imfireworks.com/uploads/1/3/0/7/130775275/xaxuraruvuzefa-wadofunub.pdfIn PDF document text
    • http://garavatta.com/uploads/1/3/0/5/130540525/durumafudok.pdfIn PDF document text
    • http://paulligginsart.org/uploads/1/3/1/8/131871655/0b8ebca9b0b22.pdfIn PDF document text
    • http://eventdecorandmore.org/uploads/1/3/0/4/130435821/relewovudelebam-rotagofanuk-mijerepagikova-bazibixinakula.pdfIn PDF document text
    • http://texaspoolremodel.com/uploads/1/3/0/5/130590162/1938996.pdfIn PDF document text
    • http://jsheadshots.com/uploads/1/3/0/5/130588984/degatewuvavazesofov.pdfIn PDF document text
    • http://jonesliquors.com/uploads/1/3/0/5/130539315/budawuwonumoropuxedo.pdfIn PDF document text
    • http://fiberpatterns.com/uploads/1/3/0/3/130379380/todise-jopepij.pdfIn PDF document text
    • http://seed2runway.com/uploads/1/3/0/8/130813965/degedabizuze.pdfIn PDF document text
    • http://virtualaiims.org/uploads/1/3/0/4/130435682/6821056.pdfIn PDF document text
    • http://wlcftv.com/uploads/1/3/1/8/131856669/565a463cd48bb.pdfIn PDF document text
    • http://cbcsomerset.com/uploads/1/3/0/5/130589353/4374192.pdfIn PDF document text
    • http://ingwersenforhouse10.com/uploads/1/3/0/9/130968994/0c7f5.pdfIn PDF document text
    • http://name-astar.com/uploads/1/3/0/7/130776356/7723831.pdfIn PDF document text
    • http://pilotec.co/uploads/1/3/0/2/130270775/d581f1b519934.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB130 3964 bytes
SHA-256: d52d25e25b5438d108bac203a1a51e4a142b362e24f4553964edd00493f1cc56
font_01_sfnt_off0000c084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC084 10516 bytes
SHA-256: 1c19985c78d5952186ce11155c82c52fa371e1e7a577040f9cfd77b61687b9c7

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