Malicious PDF — malware analysis report

Static analysis result for SHA-256 079f84261ed45fbb…

MALICIOUS

PDF

73.7 KB Created: 2021-02-25 07:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c079556846904502e53e7874d6b4cc04 SHA-1: cb451270accb71d52790dba11a4397460aa6ddda SHA-256: 079f84261ed45fbb741d810ca52ad1aeeab906dd519a04fa686d2c9b435e7e14
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a link farm on disposable hosting. It contains numerous embedded URLs, including one pointing to 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to movie script production to entice users to click on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=how+to+write+a+script+for+movie+production PDF link annotation
    • http://tafugegajotu.mygamesonline.org/64382500104.pdfIn PDF document text
    • http://arnautmebel.ru/bim_360_designasryr.pdfIn PDF document text
    • http://myimperfectmomlife.com/scratch_2_tutorial_for_beginnersq4wdo.pdfIn PDF document text
    • http://delinapod.mypressonline.com/46685137292.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/what_does_fuel_system_too_lean_bank_1_mean.pdfIn PDF document text
    • http://byseles.xyz/how_to_simplify_exponents_with_different_basesuc9t3.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/quotes_from_thich_nhat_hanh_peace_is_every_step.pdfIn PDF document text
    • http://tertov.xyz/first_100_chick_fil_as0qmz.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/969618173967iyi5.pdfIn PDF document text
    • http://susurrus.space/chamonix_tourist_guidedtnrh.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/69387098501.pdfIn PDF document text
    • http://kawlites.online/narigajawawobetefuvug9chzf.pdfIn PDF document text
    • http://frankiearvelo.com/84010676201pi413.pdfIn PDF document text
    • http://remont-kholodilnikov.website/54817949557791wl.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/15939253754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikasipab.epizy.com/dosesib.pdfIn PDF document text
    • http://vukupemenamumoz.rf.gd/atelier_tanaka_epub.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_do_i_factory_reset_my_portal.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_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 5384 bytes
SHA-256: b24c346260837ca3f1eb790a3974aef84d05804e9fbf960b6db6fbeaf104682f
font_01_sfnt_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 9764 bytes
SHA-256: 79ed45d183681a48a0b1a22ba8c2b1b7cec470a0cb51b96ec2e326ca1e8cc475

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