Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbaf82fc2e1b63ab…

MALICIOUS

PDF

82.1 KB Created: 2021-03-24 19:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2add429b696b23fd574c74d7d35a6097 SHA-1: 18fab95d6430f3ac95ff5ad36d21baaf41fd0712 SHA-256: dbaf82fc2e1b63abd316f1181064487a9576d6e810a5b4cd138c1026f909e513
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=business+law+text+and+cases+14th+pdf PDF link annotation
    • http://rowowesofazov.medianewsonline.com/must_have_to_should_ought_to_had_better_exercises.pdfIn PDF document text
    • http://goldotzyv.ru/practice_sat_math_questions_no_calculatornt2yz.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/ejemplo_de_guion_teatral_para_nios.pdfIn PDF document text
    • http://idealica-italy.site/gigabyte_ga-p55a-ud3_cpu_compatibilitygy6r7.pdfIn PDF document text
    • http://jadaribod.mygamesonline.org/bansal_classes_study_material_maths.pdfIn PDF document text
    • http://123dutch.com/list_of_quantitative_data_analysis_softwaresmgha.pdfIn PDF document text
    • http://cetop.xyz/medieval_2_total_war_stainless_steel_best_factionsep4x7.pdfIn PDF document text
    • http://mavitrade.com/jarobekadavotd7.pdfIn PDF document text
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/serop.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/cambridge_primary_progression_test_past_papers.pdfIn PDF document text
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/6979860.pdfIn PDF document text
    • https://difototasewi.weebly.com/uploads/1/3/5/9/135986065/2125235.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/9148f9032.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/10796510079.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/21ac0011-e595-4bce-a375-cbd306f62c8a/cisco_rv325_firmware_1.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4346a5-a4ee-4d98-8ecf-39a7f55c3972/determine_the_coordinate_of_the_centroid_of_the_shaded_area_shown_below.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0358a4aa-e876-46b2-a47a-7b86bc485c45/80117209798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefe5eb2-8fc9-4934-805f-6f6f58d790ed/enthalpy_change_definition_aqa_a_level.pdfIn PDF document text
    • http://bojepudadadax.atwebpages.com/88888529492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a2daa1-1ff2-4a24-868a-ac17ace10987/examples_of_health_and_safety_policies_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc76c76c-1cd1-4882-a421-06a74d98daaf/4366254137.pdfIn PDF document text
    • http://gozudil.onlinewebshop.net/vugapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2aa7d8-71ce-48d0-9842-3f0bfeb067f5/are_there_fireworks_at_disney_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4a93b4-ff97-4e4d-a70a-38226d65e3f3/tavomeludimax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a655640-ab24-4164-a295-7e2f3c186287/examples_of_cloud_computing_service_models.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_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 5496 bytes
SHA-256: 76ad4b188694d307a82b4db1c3704e4ddea6d8ee187eac777698a2a2af38a1ae
font_01_sfnt_off000111e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E9 11560 bytes
SHA-256: acd1f515234f530671035b57142f2aed419bf03e2861a3d4be7ae884871209c8