Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e03e8cbd5ffcddc…

MALICIOUS

PDF

157.0 KB Created: 2021-03-25 01:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b61461208e4bd4139e4fb711e378ebdc SHA-1: 1bb00ddcc123a6f94c4a3f47c820d63afbc47b5d SHA-256: 8e03e8cbd5ffcddc601221e689af7b595cdd79c9320e628ada6574989c37efba
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 0.9994

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://resalured.ru/strik?utm_term=manifiesto+comunista+pdf+online PDF link annotation
    • http://freshnatur.fun/bohrsche_postulate_formel17x34.pdfIn PDF document text
    • https://jimixinig.weebly.com/uploads/1/3/1/1/131164312/jivoxeran-zavusivo.pdfIn PDF document text
    • http://timurberg.ru/paintball_gear_walmartywnpk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366331/normal_5ff51ebccf244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_603187e2418b5.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/d576a816c1f3505.pdfIn PDF document text
    • https://tebokefabizanil.weebly.com/uploads/1/3/4/8/134866802/c9d66a34ae.pdfIn PDF document text
    • http://prolac.ru/allu_arjun_photos_naa_songswepsa.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/56557229060.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/6884923.pdfIn PDF document text
    • http://dorugatutaxovi.scienceontheweb.net/54773578287.pdfIn PDF document text
    • http://sedouche.xyz/norton_field_guide_handbook_onlinebrr3b.pdfIn PDF document text
    • https://kigikosofo.weebly.com/uploads/1/3/4/0/134041402/pelugoxafojuxiwiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528959/normal_5fd615fb4c581.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/pabelezegar_xofid.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/dugexuzara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_605b6a6fae43f.pdfIn PDF document text
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/38d28ca82c1ef22.pdfIn PDF document text
    • http://cashfree.store/943827769247qpth.pdfIn PDF document text
    • http://creditreportusa.info/55466305825nlyus.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/35838808756f8doe.pdfIn PDF document text
    • http://pokupka.space/kanda_sashti_kavasam_english_file9hyu1.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_off00022d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D7A 5212 bytes
SHA-256: f1c408ec86e59e574da836cbe6a5deb978ab775819fd504a31f06fc59b618914
font_01_sfnt_off00023f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F36 12012 bytes
SHA-256: 2e1e0ad90dd8820b13b8098f581c0bf91238ef0caa15a80dd5c19893fffaa886