Malicious PDF — malware analysis report

Static analysis result for SHA-256 61038da88dd45393…

MALICIOUS

PDF

73.7 KB Created: 2021-06-09 17:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5a52374f9863c5a371f4f6988c6931b8 SHA-1: 6974f719360a05d7576de3438bfc1503759a040e SHA-256: 61038da88dd453933a1f603e3c87eb11899beb72d6abd9bfa8fb405443a9b512
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to a suspicious domain for a purported free download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://garglob.ru/pbw?utm_term=ez+battery+reconditioning+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369900/normal_5fd072ce460eb.pdfIn PDF document text
    • https://zekisotirateme.weebly.com/uploads/1/3/4/3/134368555/2494861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_601ffdbbd7bdb.pdfIn PDF document text
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/f24818f01d97.pdfIn PDF document text
    • https://kepegefamoza.weebly.com/uploads/1/3/1/3/131398453/bovilab_fegidulamo_wutofusexomo_datejokifaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_604375550a7a9.pdfIn PDF document text
    • https://pezibusogesa.weebly.com/uploads/1/3/0/7/130739584/9106057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_60bab0f30ac76.pdfIn PDF document text
    • https://xeravatiwawu.weebly.com/uploads/1/3/4/6/134603636/5751313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_60273614b12ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144553218/articad_bathcad_free_download.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144503793/xem_phim_tam_mao_phiu_lu_k_1996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d35c3b0-ab87-4b86-9af1-28179aef0b0b/bizemevivupazirurixup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839195c0-6d7f-4474-91a9-75527fc42980/kujef.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/setokemutusejale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3f2ca8-b23c-4fb9-b58b-2f75ad1692a4/balls_bricks_breaker_2_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85238364-1afd-45ff-a824-98275a58255e/55431772197.pdfIn PDF document text
    • http://zusemivak.pbworks.com/f/eliminar_paginas_de_un_online_gratis.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/wings_of_fire_rainwing_icewing_hybrid_names.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/labokugexujoluki.pdfIn PDF document text
    • http://kopixikosibi.pbworks.com/w/file/fetch/144622683/8_ball_pool_pc_vs_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1510a951-6869-4267-bb78-7c96f9d00dad/vigelanasojalopegejox.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144454236/wujodulez.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/w/file/fetch/144506847/npte_exam_book.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_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 5364 bytes
SHA-256: 7b45846316f6ad0fed931569d40e819e1758c497cc4b727f2a86427d1313278e
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10764 bytes
SHA-256: 62e66819d41e58bcace0aaa107492f7dc02a2758a9f204e3ca597b1e921d9018