Malicious PDF — malware analysis report

Static analysis result for SHA-256 953bf9986b1ed947…

MALICIOUS

PDF

82.8 KB Created: 2021-03-13 22:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 103db9ddd29500ecb8983b14cd3c49c0 SHA-1: e502a0779f6308b839412e84415bbf7747568ac7 SHA-256: 953bf9986b1ed947f7aeb262eb5c549f83a43a072e41802ac71d0f07d454a34c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a payment redirection lure, potentially leading to financial fraud or bank detail theft. The presence of numerous external URIs, including one pointing to 'resalured.ru', further supports the attack pattern of redirecting users to malicious sites. No scripts were extracted, but the document's structure and heuristic firings strongly suggest it is designed to exploit user trust for financial gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://resalured.ru/strik?utm_term=thinkorswim+canada+cost
    • https://cdn.sqhk.co/dabebasavus/dGqPZXS/govipuliteka.pdf
    • https://cdn.sqhk.co/kepozote/uhfgVjb/ivar_the_boneless_vikings_baby.pdf
    • http://woxijakuzadajew.getenjoyment.net/sentence_fragment_and_run_on_quiz.pdf
    • http://kamikofonem.mygamesonline.org/toro_lawn_mower_manual_recycler_22.pdf
    • http://revilokepudidu.mygamesonline.org/27635327129.pdf
    • http://kigirifaduguv.getenjoyment.net/56648515680.pdf
    • https://cdn.sqhk.co/livulopo/ljhiajg/78289063908.pdf
    • https://cdn.sqhk.co/bijilixiger/vN96fje/ultimate_alexa_the_voice_assistant.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_cdca351e89e04eb78b0a0d6d0ac45d47.pdf?index=true
    • http://nigiragesowujow.epizy.com/ipega_controller_not_working_with_cod_mobile.pdf
    • https://uploads.strikinglycdn.com/files/8546d60f-517e-4d79-8b81-89a41fb39d69/36820500738.pdf
    • https://s3.amazonaws.com/wujixus/gawain_5_suriin_natin_story_ladder_answers.pdf
    • https://s3.amazonaws.com/defujo/manual_de_proficy_machine_edition_en_espaol.pdf
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_5138ce53109244d18f074a3ef64a598d.pdf?index=true
    • http://xofedebowin.epizy.com/vesaxuborexuw.pdf
    • https://uploads.strikinglycdn.com/files/e1a16c06-631f-494d-9a70-a3b017a4d7b9/bissell_crosswave_pet_pro_multi-surface_2306a.pdf
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_adad2ac5980f409092588df6fd56c4ff.pdf?index=true
    • http://vivemowirarok.rf.gd/fuwekikukomuwibizemifet.pdf
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_a08bc25a53794369be9b3636f1feabf2.pdf?index=true
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_55870047bd024b2f8c1de4d7c4541e27.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d5.bin
8c523f6a9b9ad7a02e1a7925e5a3fbda7c75291a290db32cb9d8c1f9a065a714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 5252 bytes
font_01_sfnt_off00011399.bin
b126bc49a5cdd92773223f5a633c7fdb54467413435b1b9fb3f7f2e4d6dbcc54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11399 12136 bytes

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