Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad1aed2e0d9b058…

MALICIOUS

PDF

71.9 KB Created: 2021-03-06 21:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 02860ff405701c6ccb64c5c4125cc2d1 SHA-1: 980d6ca85c67d358d55a93a0893acc838a22c2ba SHA-256: dad1aed2e0d9b058a72db0e67f006677fba04dd23688508dade1627fdcfa579e
66 Risk Score

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 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=what+does+warn+engine+mean PDF link annotation
    • http://raxawevamavox.getenjoyment.net/are_delonghi_and_krups_the_same_company.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_5fee2c707dddc.pdfIn PDF document text
    • https://pojajowose.weebly.com/uploads/1/3/0/8/130813819/rikuwipu.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/hp_officejet_5510_specs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5ff4d284ba658.pdfIn PDF document text
    • https://kojepogezoxuta.weebly.com/uploads/1/3/4/4/134487575/978bd842eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_601540a71466d.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/vididuf.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/7384877.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fde75da081b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_60421ebc01457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/how_to_change_time_zone_on_a_g_shock.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/miller_syncrowave_250_dx_weight.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/fokawowimo.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/tebaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/68529321973.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/jopumefidanelavutopulopap.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_f82b81641a9a41c7b2f38d3dfb146795.pdf?index=trueIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_4bad121caf8942249f0e92ef30685da5.pdf?index=trueIn 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_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 5312 bytes
SHA-256: eb13b2b3852c24b766bc97b456a01e88839968440a2698267bf05812f8506048
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 10256 bytes
SHA-256: f1555f429f2b527ee52d898bfd592622584e86efe518a45e20720380df3b06a1