Malicious PDF — malware analysis report

Static analysis result for SHA-256 870aa789243dc4a4…

MALICIOUS

PDF

76.3 KB Created: 2020-11-05 16:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a244f6a64bac3acb6c584181fcc8eac1 SHA-1: 206e9f129bde7e988c5f7c42a768940d791e9a0a SHA-256: 870aa789243dc4a4aa38007f511f6e7c879b200480fb13b2582018d6db449e2b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://traffset.ru/aws?keyword=dometic+duo+therm+rv+ac+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f8801ce8a708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5f998c5b45835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f8935f936842.pdfIn PDF document text
    • https://xatuvapezorix.weebly.com/uploads/1/3/4/5/134595272/bf870feb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f92c4e5ebd65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dugibabafod/keller_isd_calendar_2019_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/jebamidufanuridupij.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/wovavipejib.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/sijukegedufivitiza.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/short_brown_wig_with_fringe.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/xixenofoninopovutowizirif.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/42860597068.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 4940 bytes
SHA-256: 9a77f0261b9d2352140c50e763d3243c0ff886e8d198ee37ac40b1dfd78eb8aa
font_01_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 13544 bytes
SHA-256: 2db193d5d853dbdd43ec2f46fc8e76a580ab853711aed64d4e1a15b23943438d
font_02_sfnt_off000114d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.