Malicious PDF — malware analysis report

Static analysis result for SHA-256 320f7b250a919ed4…

MALICIOUS

PDF

69.3 KB Created: 2020-11-23 09:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14f28dbb1349c4fde1b79841555ec9b SHA-1: 6a1ce509e7f65cf2985331a6ff9e295b3bd4db79 SHA-256: 320f7b250a919ed45382cc20b70c328b96df1c02e841002872f9d2b97be1afa2
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were directly extracted, the PDF structure and embedded URL suggest an attempt to engage the user with a deceptive pretext, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=uva+darden+cost+of+attendance
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bakoloj/paypal_money_adder_2018_free.pdf
    • https://s3.amazonaws.com/mizeteb/isotonico_hipertonico_e_hipotonico.pdf
    • https://s3.amazonaws.com/rixevozajixezos/animation_software_free_3d.pdf
    • https://s3.amazonaws.com/jodabiladezot/zubopufi.pdf
    • https://s3.amazonaws.com/novipaliwid/pla_information_engineering.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/pekorufiteri.pdf
    • https://s3.amazonaws.com/topipovikapari/presence_of_delinquency_credit_report.pdf
    • https://s3.amazonaws.com/saziwijaxodav/pirate_bay_proxy_browser_list_2020.pdf
    • https://s3.amazonaws.com/vobuturinivi/jugefumawele.pdf
    • https://uploads.strikinglycdn.com/files/cef1dfbb-2e9c-4d13-a949-574f373dfd38/conectores_de_redaccion.pdf
    • https://uploads.strikinglycdn.com/files/6118ebef-dbf8-451c-af8c-52e17f88df6f/synonyms_for_another_person.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6c0.bin
ec861e976842ba47a0a22e1e9625843149a12184ede7464b3880fcf1f16cc725
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C0 4776 bytes
font_01_sfnt_off0000d6fe.bin
73550f700181aaa88df3930ee15eb39c6a24fa92cba51c3a3ee40b7693944abe
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 10408 bytes
font_02_sfnt_off0000facb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 4324 bytes