Malicious PDF — malware analysis report

Static analysis result for SHA-256 49523a55ede8e85e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 01:37:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b765e9f0b65c2f102455a8bc8fd156e SHA-1: d4926854482518f3660d57b560063e34ec822ac6 SHA-256: 49523a55ede8e85ec806433ab783a544b1139f09c96589bdba4df8182906c6e6
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including an ML classifier and ClamAV. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a number, consistent with phishing or tech-support scams. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile indicate a likely attempt to redirect the user to a malicious site or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://soxebez.ru/wix?keyword=duracell+ion+speed+1000+battery+charger+manual
    • http://899themes-demo.ru/affine_transform_python_3dki6x4.pdf
    • http://novonet.online/french_pronunciation_guide_ipaxy4q9.pdf
    • http://tejovotemikodes.getenjoyment.net/79698609493.pdf
    • https://cdn-cms.f-static.net/uploads/4411480/normal_60483df071b7e.pdf
    • http://kiwenalod.medianewsonline.com/what_are_the_elements_of_crm.pdf
    • https://static.s123-cdn-static.com/uploads/4387709/normal_6002b59b4ad29.pdf
    • http://vebuwovivulab.mygamesonline.org/concise_paediatrics.pdf
    • http://xolokeminapi.getenjoyment.net/loralipufopokevakozap.pdf
    • https://static.s123-cdn-static.com/uploads/4415526/normal_60052c5e35e25.pdf
    • https://cdn-cms.f-static.net/uploads/4459625/normal_600d45148bc88.pdf
    • http://shopwithsale.website/foundations_of_materials_science_and_engineering_4th_edition_solution_manual4g079.pdf
    • http://kenugizi.getenjoyment.net/89846503735.pdf
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5feb6781bb139.pdf
    • https://cdn-cms.f-static.net/uploads/4465255/normal_603d3e00242f8.pdf
    • http://marketeuro.pro/technical_report_template_free63gc8.pdf
    • http://wonizojaru.scienceontheweb.net/cricket_rules_in_tamil_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://refusunono.onlinewebshop.net/pubarudidivizakevapofo.pdf
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_dd49de4098c9485fb98bd4f428aebebb.pdf?index=true
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_68e30cb997dc47dab969ef221de7f4dc.pdf?index=true
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_35a688c637674b348bacf5bbde144c30.pdf?index=true
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_c04215ec945c476fb5708241a632385e.pdf?index=true
    • http://madepadejatutof.onlinewebshop.net/antas_ng_wika_quiz.pdf
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_d72dd72489c64b3e871a4df85b79e37f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec55.bin
54736a717ba34531324a59c625260e1a614e1815edc076a369cca6192a0a0d56
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 5804 bytes
font_01_sfnt_off0000fff1.bin
43976f9ef958d432e090395c48d8791d8a293ebe50bc78afb95ef3994d3e93cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 10684 bytes
font_02_sfnt_off00012475.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 4324 bytes