Malicious PDF — malware analysis report

Static analysis result for SHA-256 294ae2bcf40c09ab…

MALICIOUS

PDF

77.6 KB Created: 2021-05-22 13:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d04756db8b70c7a0ddc4b299af1c2e98 SHA-1: d605cdcca380b1da6e13af26d1565ff7d4a95df9 SHA-256: 294ae2bcf40c09abae3a774679ffbcc1f219fac52f2dac0c844214139ba1cdc9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one primary malicious URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded links suggest an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=samsung+s7+edge+android+9+xda
    • https://cdn-cms.f-static.net/uploads/4415065/normal_6029e6c42a753.pdf
    • https://luloludelipirad.weebly.com/uploads/1/3/5/3/135318650/tuxiluja.pdf
    • https://cdn-cms.f-static.net/uploads/4498376/normal_600eade3c6a97.pdf
    • https://lonofajizol.weebly.com/uploads/1/3/5/3/135389348/182b30a.pdf
    • https://gegirugotosizuk.weebly.com/uploads/1/3/5/3/135397722/paloji.pdf
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/bedajofefelakuko.pdf
    • https://tugizikorosizo.weebly.com/uploads/1/3/4/5/134502987/fad328f4470d59.pdf
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/2670103.pdf
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/db542.pdf
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/9346304.pdf
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fc7a9e656b4d.pdf
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/dumakup.pdf
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/kikarugosofa-wokepakirag-podise-sudipuxujovofe.pdf
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/ginodavud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fb0e13a3-4334-4c18-8355-1d04ae467608/geralds_game_monster.pdf
    • https://uploads.strikinglycdn.com/files/815cf37f-30d8-4c71-bdcb-941071fe457c/how_to_reset_a_kenmore_elite_refrigerator.pdf
    • https://uploads.strikinglycdn.com/files/254d5f7c-96de-42d2-a8dc-fae0fe198684/plant_physiology_and_biochemistry_free_download.pdf
    • https://uploads.strikinglycdn.com/files/b41b1f95-bb44-4506-9a28-6d9635f6831b/50493528614.pdf
    • https://uploads.strikinglycdn.com/files/36851c6d-dc63-42d3-8519-bffef621f03f/bobalamepewunokomisavi.pdf
    • https://uploads.strikinglycdn.com/files/0bca96e6-e66a-4921-bd62-c8a6d0e43f1d/tetiti.pdf
    • https://uploads.strikinglycdn.com/files/52e475d9-9a42-4b51-b7cf-2fbebe9355ad/dimisifakurumumilisuni.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_off0000ed98.bin
b1eb46fb3766646e1d0b2a5cf6869944228ce9ca40fdc8214fdebf08c6a12de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 5520 bytes
font_01_sfnt_off0001004c.bin
7ec76224973c91aeab642ac8b837169f08e576d69490ccda761a95e4262aa8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 12048 bytes

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