Malicious PDF — malware analysis report

Static analysis result for SHA-256 7995835d449e5bf0…

MALICIOUS

PDF

81.7 KB Created: 2021-04-01 17:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4a51bc6b77f5d4be39ab384df9b61409 SHA-1: 5416304fec9e026d0761c2655e0c3d788360c133 SHA-256: 7995835d449e5bf0f2efb5c891ed52073210165dd6faeaea626a120764c5551e
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or link farm attack, as indicated by the high number of external links and the "PDF_SEO_LINK_FARM" heuristic. The embedded content, though obfuscated, suggests a lure related to a "John deere snow blade manual". The presence of multiple external URLs, including one pointing to `jumiwimov.ru`, strongly suggests an attempt to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/aws?utm_term=john+deere+snow+blade+manual PDF link annotation
    • http://natlab.ru/mipirulitexasipumoxobubin1jvsq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_5fd8b2e5842aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_603fcf9046afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_6039d1fc5daf1.pdfIn PDF document text
    • http://tb-films.ru/jazisomadumubegikv5834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488569/normal_6008d6cbd335b.pdfIn PDF document text
    • https://lifowedo.weebly.com/uploads/1/3/4/7/134707215/vimubufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_6041a422a225f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_6060ba3f58f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_6018651f468d6.pdfIn PDF document text
    • https://wukakokusaz.weebly.com/uploads/1/3/0/7/130739200/nelowusuxeko_jejeziwesaxifo_kawajalune_gafekowifowev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c3f05c-0d96-4936-891b-a6961c980b30/the_hunchback_of_notre_dame_2_trailer_2001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11aaa4c9-aad9-43a1-9c48-b065f8a43d62/mebalof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd04516e-419f-4a91-acba-b78407027f6d/venewupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987d85c6-3c5f-4914-bbf4-e737e0deb693/killing_floor_2_video_game_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983ee579-4b89-415a-8a63-0a72f24df9d2/m2n78-la_cpu_support_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed24e88e-f7d1-4ca6-a52c-3f174910945d/vasimijaramamudejakegusir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad53661-f283-4b0c-a788-6ffff1cd9ec9/jijenoxutivewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0ae941-8f44-4156-90fd-7b8805bfb28e/why_is_my_ue_boom_not_connecting_to_my_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587b9348-ab8b-4b0d-a0e2-3e56ebb8b697/husqvarna_445_starting_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4e16a6-4490-4d19-a8e6-7fb851a48c0d/asp.net_core_mvc_crud_example.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_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 5284 bytes
SHA-256: d98bcfe52a3ab6dc40059c0b043cec56da76cc75d3d5dda9e62e82d534c8ef3d
font_01_sfnt_off00011469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11469 11232 bytes
SHA-256: 49198b4bf132ffb22220b53a1b47d342375eaaf00f7b46cdc043f505b3297932