Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d8398fdf397638…

MALICIOUS

PDF

74.7 KB Created: 2021-05-22 00:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d89d8997a4486b3c0f37cf38df3db46a SHA-1: b8b650732682429acc8b4b7bce03adf91e56f6d2 SHA-256: e9d8398fdf397638a5d6d2cec4045ab5ab0aa7bced2f4ad3263e6275eb685150
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, with one pointing to 'xezojetit.ru', suggesting a potential phishing or malicious content distribution attempt. The presence of numerous links also indicates a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/strik?utm_term=eric+foner+give+me+liberty+5th+edition+pdf PDF link annotation
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/8046911.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/6349778.pdfIn PDF document text
    • https://gokejubekilebu.weebly.com/uploads/1/3/4/3/134376129/c7dc7f.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/91dfacc2379873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/lanetimolox.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/vadetosibonekujaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/annual_maintenance_schedule_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7127ced-c42e-4aaa-baab-ad2e235fbec8/peter_kump_book_breakthrough_rapid_reading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb365aa-3855-4d95-86a1-4e4fce7da514/86603874041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94543a92-ada2-4bb8-b56d-dbbe17e264bb/formula_para_sacar_volumen_de_un_prisma_octagonal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123e0e0e-a1cc-44c7-9ac7-c0f5f79589d7/67795503669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de047a5a-e165-4661-bad1-d11bfe6a3cec/29290898544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14c361a-ffca-47f4-bb39-9b22f804157d/zubapikujoluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a788698-452d-47d2-a2b1-d083eb90f16b/6074683836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a4ca5d4-0218-4661-91ed-060377640f7f/navakojugenebote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b632c7-f305-4f9d-9b61-2705e9a90340/practice_of_statistics_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/24513290079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb43b12a-0f1d-4123-9c58-78f86e2604be/41480254643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d7378e-7084-4a98-ab5b-0edb3bb8e200/pomamar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654cdc7e-9fd6-4181-98ef-7d3a4d91cffe/papojozazun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba0ec99-8ba6-496f-a662-1fb8a0b1be0a/the_100_best_astrophotography_targets_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36f553f-62c3-4f16-8832-e86d55c9b6e8/check_vehicle_registration_by_engine_number.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/lebodadorurifodujetix.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 5564 bytes
SHA-256: 0a71455770a31180f9d92be9c3608dd91136912e9ea9a5ecb52d208fa4839a60
font_01_sfnt_off0000f94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 10456 bytes
SHA-256: 0b3aa57a6a6e86954d8a98700b8b54f69a8dd625976d8e3f227784f3a05c63ed

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