Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca08531a182b848…

MALICIOUS

PDF

78.2 KB Created: 2021-03-06 11:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c801d5640da89b195e6dd874fcec4f7d SHA-1: adfb9c95892f75069e44f81184fdfe46fcff73cc SHA-256: eca08531a182b848c0b3b03ff65b0e2909bdf9dda8d6c66e57e97c3c2c066a75
146 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm on disposable hosting and uses a callback lure, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were extracted, the presence of external URIs and the nature of the heuristics point towards a phishing attack that likely uses embedded links or redirects to malicious sites to deliver further payloads or collect information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/strik?utm_term=hurt+feelings+report+template PDF link annotation
    • https://cdn.sqhk.co/pobijejok/dPgjidg/xuzetogavisurake.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/ugjig3l/risufezepa.pdfIn PDF document text
    • http://uptodate.site/emergency_psych_evaluation_near_mewgy8d.pdfIn PDF document text
    • http://lalat.space/565928816766ntea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd8eb0d303b3.pdfIn PDF document text
    • http://nout-prodat.site/minimum_industry_safety_training_answerscm0th.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ibgfHii/sozokanefiwarenefaxolali.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/11852310560prrwy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_6026d3cb86e0d.pdfIn PDF document text
    • http://store50off.info/xbox_one_controller_mic_adapter_not_workingueo7h.pdfIn PDF document text
    • http://laitlabs.pro/84372934145yz2i6.pdfIn PDF document text
    • https://cdn.sqhk.co/wixikinotu/gZgfib2/my_little_princess_castle_1._13_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/gfBAiaD/980320608.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/hfhdfif/ground_operations_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/ggjSjjg/ice_cream_truck_menu_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/hczhiw9/battlefield_4_commander_app_android.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/74265641394nzbu7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_603ab3c3e243f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_60271b6828a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_6037e41ce6a84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd57266-2f01-43f8-b4be-1f6eaf56a473/sims_3_camera_sims_4_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3feee3-a48d-41bf-b772-b882ae94e22b/what_is_the_alpha_prefix_for_anthem_bcbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18dfbe97-7964-4ffa-9a1d-1225635ceea8/rinilavanixesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fbd893-8d53-4e20-99e6-92603296b252/88091960927.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_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5184 bytes
SHA-256: cb82ffa2560e869a54d8b71de7c4bb6d4f39bbc5f15aa2248321b26ac367726a
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 11304 bytes
SHA-256: d268ad8d771175b9d882b2cabf8bda63ea332bfb2cb01cc226d0f1c5b10e79b9