Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2f91e722e2a0d5…

MALICIOUS

PDF

85.8 KB Created: 2021-05-07 23:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: be00215dee143dbce1f8c0055f710634 SHA-1: 88809882f2f8bcc0e79953e26ae54fb0aa1795e6 SHA-256: fe2f91e722e2a0d5849be1d2effb1c5bbd3aef4848a7ae170a4ba0fa232d3967
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=how+to+listen+to+music+throughout+the+house PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445754/normal_602b0383e8409.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/cagjCih/live4_gopro_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476765/normal_603c5cd88aea3.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/fabavilujigujijid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_6008717fefc95.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/pSYifjb/13615103212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503791/normal_5ff4c7adab778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_602513fad52ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377924/normal_5fdff0b29551b.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/c8f9ac086ca5.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/1993954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_604aeacf7bc8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_6047597a05078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_6033838ac57ea.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://uploads.strikinglycdn.com/files/1ea8b417-63f7-4979-be5d-78f2562a1e57/how_to_take_blood_pressure_with_wrist_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6dc4d60-8a0a-44d4-b41e-49ba7cffc409/amazon_echo_commands_for_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d18253-7748-4edc-aee5-2c9f53e8bac7/39165382732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1af22a6-eb28-4cfe-b930-87d9b323466a/reading_comprehension_practice_online_6th_grade.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_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 4936 bytes
SHA-256: c934d13032a1e22b2f664dfe9f6f99274ca7236c91a66078fd21f57e795cd884
font_01_sfnt_off00011563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11563 11232 bytes
SHA-256: b0b9f20f01a13948e50a41ac547864f9149edfd1b1233cf9fc1bc9e980efb5da
font_02_sfnt_off00013b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.