Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fe9cfe266ead79…

MALICIOUS

PDF

74.1 KB Created: 2021-06-07 06:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4373398a50620a07b4feb62c99ef1fb SHA-1: a5e938e8f3b44fe5fe1c486dd0713c3185b9ded2 SHA-256: 22fe9cfe266ead79a60966863de4614e6e07d7864630c18b5fea0887911aad4a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to potentially malicious or deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://chcial.ru/pbw?utm_term=what+is+the+standard+size+for+base+kitchen+cabinets
    • https://newadagunezadev.weebly.com/uploads/1/3/4/6/134684801/0553a257832e.pdf
    • https://nenoxasu.weebly.com/uploads/1/3/4/6/134670024/c9f8eef6.pdf
    • https://gusawinifob.weebly.com/uploads/1/3/4/3/134343307/3712286.pdf
    • https://birijejukuz.weebly.com/uploads/1/3/5/3/135386669/5124122.pdf
    • https://xovamiwif.weebly.com/uploads/1/3/4/0/134096018/9e09c9a04a93805.pdf
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/zomapaf.pdf
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/f4c74e.pdf
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/acf6ad423b38.pdf
    • https://guzesunidami.weebly.com/uploads/1/3/0/8/130873942/5862022.pdf
    • https://rabesala.weebly.com/uploads/1/3/5/3/135394244/99d2c68a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ec47b440-a497-4114-b3b4-6937513eae81/que_beneficios_tiene_el_bicarbonato_de_sodio_para_la_salud.pdf
    • https://uploads.strikinglycdn.com/files/fd5c25fa-6c1d-46b3-9dda-9188f85fda47/pharmacy_sig_codes_latin.pdf
    • https://uploads.strikinglycdn.com/files/48924498-9991-4272-9901-5a2290a38c73/star_wars_edge_of_the_empire_character_creation_guide.pdf
    • https://uploads.strikinglycdn.com/files/21de0862-eba5-4f03-aef2-c851dacb4642/blue_yeti_microphone_settings_for_podcast.pdf
    • http://mumasenekera.pbworks.com/w/file/fetch/144423921/fire_hd_8_-_8_-_tablet_-_16gb_8th_generation_2018_release_-_black.pdf
    • https://uploads.strikinglycdn.com/files/9b5dea06-6dc7-40e1-a73d-8727afc95475/93867192665.pdf
    • https://uploads.strikinglycdn.com/files/d2caf611-6342-44d7-995b-eb48e65788d0/how_do_i_fix_my_snowblower_chute.pdf
    • http://gepefupugalu.pbworks.com/f/jexolawuw.pdf
    • http://tagexoba.pbworks.com/w/file/fetch/144422652/tojigewujagajij.pdf
    • https://uploads.strikinglycdn.com/files/f76e1b16-b5a2-4623-8534-412f05783847/jbl_lsr305_review.pdf
    • https://uploads.strikinglycdn.com/files/4547c988-9a7b-4cf7-b1ca-0bb4213239e4/remote_codes_for_urc-8820-cisco.pdf
    • https://uploads.strikinglycdn.com/files/5a83bcd0-bfaa-4b82-833a-05f03da06c1a/63200257119.pdf
    • http://munonoraze.pbworks.com/w/file/fetch/144654711/wewamolerapis.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_off0000e4ab.bin
5c05ee67c0b76b6ab509763747c5acd2b6e884c39cded6702d9aa9f9acd73f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 5344 bytes
font_01_sfnt_off0000f6eb.bin
99a63acae576f882f1b6dd14a32b4675300340af8b4fae9184543ff234fc02bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 10432 bytes

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