Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7bd2bf7dde3d08…

MALICIOUS

PDF

653.3 KB Created: 2020-11-20 20:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bd81aba66e5c76e05aa0dd8d82e3a67f SHA-1: 089b6ce190bad103a4e4d6793f2e360f52bcec23 SHA-256: 7b7bd2bf7dde3d08de0b2f940ce0492adf98631afd6021805df9db1eca3e8b4a
174 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link and was flagged by a machine learning model and ClamAV as a phishing trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document attempts to trick users into calling a phone number, a common tactic for callback phishing or tech-support scams. While no scripts were explicitly extracted, the presence of malicious links and the nature of the heuristics suggest an attempt to exploit the user through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7599

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=fmr+llc+annual+report In PDF document text
    • https://gazulaloruvuv.weebly.com/uploads/1/3/4/6/134693071/896713.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/ganopokeko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5fa1208844533.pdfIn PDF document text
    • https://zubawolovef.weebly.com/uploads/1/3/4/4/134481331/396f4.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://s3.amazonaws.com/bagisi/alto_sax_sheet_music_pop_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d6d033-f21c-4272-a3a0-4b7148ac0ce9/53945610901.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/iron_jawed_angels_movie_guide_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5581a00-2658-4162-bbe8-1c0efb52732f/71863586485.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/8339625385.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/30472461968.pdfIn 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_off0009d88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D88B 4692 bytes
SHA-256: f4a18fe97fe718fa5f73a74a31d07ccad82f853574bfc805b2d6e84a7c7fd2b0
font_01_sfnt_off0009e85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E85F 13440 bytes
SHA-256: 34266aaeff912af26994e476733da28cc6e1a9accbc553954466de9238cc0e88
font_02_sfnt_off000a1426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1426 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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