Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e49398a5673d128…

MALICIOUS

PDF

76.9 KB Created: 2021-04-28 20:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d8eee7ff426ecb0211d52f605bcd6982 SHA-1: 573e8325da5ee94bced409876699baa8414dfb22 SHA-256: 6e49398a5673d128a76303cf6274d27ff24d897593589712e499a05f63ae221e
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 0.9999

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://golowaki.ru/strik?utm_term=shakespeare+retold+macbeth+plot PDF link annotation
    • http://zebrait.fun/77565229450pobu1.pdfIn PDF document text
    • http://dosefokinuvulo.mypressonline.com/grief_is_the_thing_with_feathers_online.pdfIn PDF document text
    • http://kmplitka.shop/what_is_the_diet_chart_to_reduce_weightxjyqc.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/ficha_biopsicosocial_de_secundaria.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/82656763122.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/all_cheats_of_gta_san_andreas.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/minitosamafize.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/faviwetaserazibojoj.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/samizojisalo.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/ford_3000_hydraulic_pump_gasket.pdfIn PDF document text
    • http://lnstagramsecurity.net/plc_programmable_logic_controller_tutorialr0vbb.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/vigevot/85435672377.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/kodafovusema.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/31217825147.pdfIn PDF document text
    • http://xarotuwegu.rf.gd/badmash_toka_full_movie.pdfIn PDF document text
    • http://zivexotafoni.myartsonline.com/bhagavata_purana_english.pdfIn PDF document text
    • http://fudejavifexas.epizy.com/what_happened_in_the_book_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/86070181871.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 5620 bytes
SHA-256: e1e52344de5987aebeaa044a775fda19d5338afd88fcf99b27815e982bf5717d
font_01_sfnt_off000100da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DA 10580 bytes
SHA-256: c22bb0d0643c9c48e9bbc90885514ba645c4f6497c9eed08e59fd7e04fb0fa3f