Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62bb3ccb1b7bbdf…

MALICIOUS

PDF

81.2 KB Created: 2021-05-30 04:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef5e6424c63fb7a33751bc03d03b5381 SHA-1: 721331b86373d5865ad557e2a27c4d262344f0d4 SHA-256: e62bb3ccb1b7bbdfdd911ead005c119e3a040f7020727f118c2395503c460fbe
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, many of which point to unrelated PDF files hosted on services like Weebly, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://nipisod.ru/strik?utm_term=how+to+adjust+a+recipe+for+a+convection+oven
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/mexovorerivizif.pdf
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/111f2.pdf
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/b55c4582b49e3b3.pdf
    • https://vajawopi.weebly.com/uploads/1/3/4/5/134597817/fitev.pdf
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/bulefegipofuved_kuxejubuk.pdf
    • https://nitipitu.weebly.com/uploads/1/3/0/7/130775162/9824910.pdf
    • https://lajakobu.weebly.com/uploads/1/3/4/5/134599687/vomon.pdf
    • https://botitanape.weebly.com/uploads/1/3/0/9/130969352/d916adc8db.pdf
    • https://gufuvagowuwimul.weebly.com/uploads/1/3/5/3/135333734/4515551.pdf
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/fukisi.pdf
    • https://badazunezibak.weebly.com/uploads/1/3/5/3/135338398/pivonedutizojiz_zonefegofaraf.pdf
    • https://menajogatidufe.weebly.com/uploads/1/3/0/7/130740573/9944186.pdf
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/9298726.pdf
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/malukiwamitevix.pdf
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/4553469.pdf
    • https://sivipekuz.weebly.com/uploads/1/3/4/5/134596285/redamaneler_nulorur_kebosulun_pivubebaju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d3543a40-4f7d-499e-bfc4-3daca76b3273/critical_race_theory_book.pdf
    • https://uploads.strikinglycdn.com/files/a2e5b949-8cfc-4935-ab63-33b2ce56266c/65715154785.pdf
    • https://uploads.strikinglycdn.com/files/bb67f6a7-13a5-43e1-9cd5-ead802264cc0/hitachi_10_sliding_miter_saw_c10fshc.pdf
    • https://uploads.strikinglycdn.com/files/600889ba-b0c6-4223-9089-566f8efadc46/speaking_up_without_freaking_out_matthew_abrahams.pdf
    • https://uploads.strikinglycdn.com/files/167fa96a-aaa2-4c61-810c-db9caaab1afc/gemazoxo.pdf
    • https://uploads.strikinglycdn.com/files/841f31a9-a850-472a-9691-3684ab53e9c6/what_are_27_books_of_the_new_testament.pdf
    • https://uploads.strikinglycdn.com/files/96acf162-7984-43ac-8f3c-c5ae4b7e4ac0/64736111869.pdf
    • https://uploads.strikinglycdn.com/files/5e7a7df4-1f23-4308-a22b-568b1b9a4369/motorola_pr400_battery.pdf
    • https://uploads.strikinglycdn.com/files/31e281f3-cf6b-46df-9fe1-a7b49d873801/nofuzuz.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_off00010095.bin
e5a708de67de7a4f8f415825ec1d8474a64b1977309ce75992aea351ad67b7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 5308 bytes
font_01_sfnt_off000112ce.bin
67399b32f356136ac0a0cd5368bdbe54759e776ce7464136f43213aa29502cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 10740 bytes

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