Malicious PDF — malware analysis report

Static analysis result for SHA-256 e063d938d4290a07…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 14:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7b3fa82333aab88bd3332778dd92c14a SHA-1: d2e4623762734eb36df2a45b00853e17cd0399d3 SHA-256: e063d938d4290a0780840c5e7a179cf72199bb4bcebae8ef9f143eef822f644c
126 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. The document body, though partially corrupted, suggests a lure related to 'Magic chef refrigerator repair manual'. The presence of external URIs and link farm indicators points to an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=magic+chef+refrigerator+repair+manual PDF link annotation
    • https://cdn.sqhk.co/mikedeto/jjuNwRr/93080258437.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/d3qnyZZ/ultimate_fishing_simulator_vr_dlc.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/top_10_car_bass_music_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/qgfgjMg/vetawofijelofokivisirase.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
    • https://uploads.strikinglycdn.com/files/4ccc784f-aafc-4e26-9e5c-0a92279a2e80/wall_street_prep_financial_modeling_best_practices.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/jupadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d25b87e-b3b4-4a77-be49-3e6ab54db854/govane.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/brawl_stars_mod_apk_8_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583b646f-1a54-4b63-8a8a-527110636b41/sexarovul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ff24fc-c2bd-4606-8974-2c79bb32217c/how_to_choose_a_wetsuit_for_diving.pdfIn PDF document text
    • http://notijukigexu.rf.gd/goduwimisediletiru.pdfIn PDF document text
    • http://viputuv.rf.gd/homelite_leaf_blower_carb.pdfIn PDF document text
    • http://wusojomirewo.epizy.com/how_much_does_a_detective_get_paid_a_year.pdfIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_bc6eb1e939244e0f830c0412929cf2c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8229bb7d-7282-4bc1-96fb-2ce70c3a6d24/wujodifesubisijowepidavot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a1704b-4bd2-4cea-81ff-7063c7acfadb/solution_dilution_calculator_molarity.pdfIn PDF document text
    • https://2e9d2e4a-15d5-4529-8b29-235aceea4e08.filesusr.com/ugd/cac96f_42075ffe88884154a5e074435042bcdf.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_d2b88be208844b1984aebd0a37979773.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 5140 bytes
SHA-256: ed7a0d68b13f92a875e07240510a18ba9b4fff536d798a2547ef1669a2e313b5
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 10584 bytes
SHA-256: 0739002b4a6121e9a471f7deeff3ac20e1edc2e55a66463801238284e98f8d3d
font_02_sfnt_off00011b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B38 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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