Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d4f333a3fd2513…

MALICIOUS

PDF

77.1 KB Created: 2021-04-27 10:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 494014b605ac0d87605dec37d491d098 SHA-1: d0dc9992b598db859406f2e483ed40f0a7caabb4 SHA-256: c3d4f333a3fd25135725e3b6ea7c9e91215e12beadd5eacdccc8a5f40fe2be65
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with a tech-support scam or phishing attempt. While no scripts were explicitly extracted, the presence of external links suggests a potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=dyson+v6+absolute+cordless+vacuum
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/xanumabi.pdf
    • http://kogawanitikip.iblogger.org/anoplocephala_magna.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5fd165a961ec2.pdf
    • http://instapriz365.online/el_libro_del_zohar_completody61l.pdf
    • https://cdn-cms.f-static.net/uploads/4474475/normal_602f9654bfbbb.pdf
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/1e8e8387.pdf
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/joneturobofug_punorewegores_birupixivedav_vosunuvogerojez.pdf
    • http://kudukulid.22web.org/volewolasekodewivawuwopa.pdf
    • http://bella24.xyz/zugisirijiemiwb.pdf
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5fe26a432c247.pdf
    • https://cdn-cms.f-static.net/uploads/4470409/normal_601952b7e2dba.pdf
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5fcbbe1e8a633.pdf
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/dawaxurekesuma_pudaz_mepotixezem_jefexilirogod.pdf
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/3e68308e2e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55be81ce-c150-40f7-aca0-56120fbbd2c7/bodudarojinelulos.pdf
    • https://uploads.strikinglycdn.com/files/33dca293-6a70-4f0e-85a8-ad1b66a66448/bright_starts_ingenuity_inlighten_avondale_2_in_1_cradling_swing.pdf
    • https://uploads.strikinglycdn.com/files/03fa8e69-0e8f-46df-921c-95e779c7a196/49248862241.pdf
    • https://uploads.strikinglycdn.com/files/293049fc-9734-472b-8835-cac93e67ba74/webijuburiraxebokef.pdf
    • http://mizosaribadadu.rf.gd/what_is_the_name_of_the_shining_hotel.pdf
    • http://zaposupi.epizy.com/winusonipodejoreza.pdf
    • https://uploads.strikinglycdn.com/files/4e4eb877-7d96-45f3-aa74-a97695635f4e/14146219265.pdf
    • https://uploads.strikinglycdn.com/files/43f8dc9b-1efb-435b-a43c-f982e5781871/39415280172.pdf
    • https://uploads.strikinglycdn.com/files/b31715a9-5fad-4e1c-a447-c9e1413c562f/vuxoxebalakezot.pdf
    • 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_off0000ed77.bin
6210845e80e07dd226b6da593a084252c8909f8f9b8fad2b99f61a9367bceee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 5540 bytes
font_01_sfnt_off00010044.bin
a7ac7204c3c41827acc69d217072ef54ca5cb0bab29b46643288ae9491fd67d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 11308 bytes

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