Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2e8aa535bcf6c8…

MALICIOUS

PDF

87.9 KB Created: 2021-04-28 12:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8645668382a0b2eab4ab0e9e8d17b236 SHA-1: e2864664a5f21368fbee8d5725b50fe1ea6bab4f SHA-256: dd2e8aa535bcf6c8f2a5ae0f4663181269142e07be3aeab98fa100ddcd6d3b3f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=verizon+fios+ipv6+setup PDF link annotation
    • https://cdn.sqhk.co/jotapepikota/UQijYib/video_editor_salary_per_hour.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/fujojodalalujuriluzexija.pdfIn PDF document text
    • http://vazewuxu.mywebcommunity.org/74639251483.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/pizerurimamojalunizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_6068d5230176d.pdfIn PDF document text
    • http://fsbsiod.com/571261283320uzqt.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/4hbIKRs/yellowstone_national_park_history_fun_facts.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/minaxotuwobugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_606623eb1e8e4.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/heIizch/carrom_board_championship_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417535/normal_5fecaf1b160df.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/eGVsQSA/96987910091.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/bible_study_on_joy_of_the_lordbmxfe.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/cambridge_pet_writing_part_1_practice.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/51073836125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5fefbdceddd65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_6046fcf851b16.pdfIn PDF document text
    • http://bet-info.ru/yo_te_amo_carlos_davidsaf9i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://semowomeso.onlinewebshop.net/asma_cardiaca_tratamento.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/black_and_decker_cordless_lawn_trimmer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 4764 bytes
SHA-256: 9859719330a5b898b5b4c014829a6ae579b57780f8486d3a5e39fc071bd6ec41
font_01_sfnt_off00011d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0C 11452 bytes
SHA-256: a754b04bb84dfa01d689c3a63a6f0714f83078454cda39869298ab66088cdcad
font_02_sfnt_off0001440c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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