Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fc815d26eb961d…

MALICIOUS

PDF

82.2 KB Created: 2021-04-03 22:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9607fb14dca301c5040f4390bdfb7d94 SHA-1: 2786b6d3665d3ae9dded35c9d939fadaf28fa23c SHA-256: e8fc815d26eb961d0c12554120495351af96d93e0d6ecb52945d054d67f77c73
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, further supporting malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence score point towards a malicious PDF designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://dugedepap.ru/strik?utm_term=what+the+bible+says+about+marriage+divorce+and+remarriage PDF link annotation
    • http://donbetosstreettacos.com/washington_wizards_jerseys_2021wv6s5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_605a1fc579cd5.pdfIn PDF document text
    • http://webmastervlad.ru/the_black_eagle_charge_bladeejw8z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_6008e6732b69c.pdfIn PDF document text
    • http://praktika-ingenieur.com/barewejufijube1tc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_6041e6ff281ef.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/9830038396131okv.pdfIn PDF document text
    • http://molotkov.site/noxazowugozan3w5m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_60466cc5a6539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_60634329096fb.pdfIn PDF document text
    • http://shopyou.online/mainsheet_fine_tune_systems0464z.pdfIn PDF document text
    • http://ipatovaalena.ru/dogaze7xlij.pdfIn PDF document text
    • http://demask.fun/ducane_air_conditioner_cleanings94j3.pdfIn PDF document text
    • http://starkrobotics.org/cuanto_es_1_nanocoulomb9lwbf.pdfIn PDF document text
    • http://raisinshq.pro/xurakifawawutc2xmt.pdfIn PDF document text
    • http://urro-hu.com/99574106173xxgza.pdfIn PDF document text
    • http://wordsideget.top/how_to_connect_ihip_headphoneswi7s2.pdfIn PDF document text
    • http://cloudmarket.website/little_house_on_the_prairie_reboot_imdbrbjgh.pdfIn PDF document text
    • http://fringigejy.site/nusugufowapazaxu5yev1.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/jotizifime/17872070058.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/2166594272.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_36aa51c00bb343a6bf6c50be00bb7a75.pdf?index=trueIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_106e871e33dd42f0942f7097679c064f.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_bb91d381ed1f486599acd4e6c37af675.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fifomi/84126900221.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_b7367ae377aa488fa90100e9d86bf2ee.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_off00010313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10313 5668 bytes
SHA-256: 35c2997e24981ebf189b7eac0d32ed16fc2f932d20dc47c395b00757bab0f099
font_01_sfnt_off00011644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11644 10800 bytes
SHA-256: 3251ce059f6b0e6138f2dc8d56d605583e2247fd380299ac5d77c3e59a7b28cd