Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5d200ae584ccf2…

MALICIOUS

PDF

89.8 KB Created: 2021-05-28 13:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1a256ba7fd7630fd0337cf32a0b6fa65 SHA-1: 286a56c32a661ac2ef59ba195af0755f86dd621c SHA-256: 7d5d200ae584ccf2e49b1efa58677588608db076d76754d3a32835eb13587fec
186 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 hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=cost+to+open+kung+fu+tea PDF link annotation
    • https://gikenizebos.weebly.com/uploads/1/3/4/7/134706738/9245457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_602d99d2184ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_5ff8728bbbc24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_6049c2781a451.pdfIn PDF document text
    • https://liwojugimigazip.weebly.com/uploads/1/3/4/9/134904469/1889502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_605d7b093cc97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483388/normal_6069a330c411d.pdfIn PDF document text
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/xevujuremugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_6023f50d3c80b.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/jevinizewakid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fcff67702369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_6047ddae352cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5fd6229585394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_601b7e57ba214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5fc644460a36d.pdfIn PDF document text
    • https://lelugiva.weebly.com/uploads/1/3/4/5/134508788/pepixixu.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/b44a85c4-3eb8-4505-be82-21b3e2cc20d1/what_is_the_best_workout_program_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fb9d0e-4148-4093-8141-160f0559d168/luwivagemab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ac828b-28b8-4434-b31b-df4d92af9af7/1431312744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55207cf9-062f-4a76-883c-e507eaf9bd14/68665325707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb76b88-5f3c-4873-99c8-4de5b413d899/what_is_a_soft_touch_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8881df-a570-4bf8-b780-edddce80366f/28565096236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84cc3c2-7ed2-47cc-b1d3-507308dac915/63497726538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b23807-1850-4c6a-886a-d2a32768a7d8/norcold_rv_refrigerator_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a3904c-c5a3-4b02-8ef7-e80847978b2e/62142659682.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 12948 bytes
SHA-256: 21f34dbfb992aadb7c23d2835083f2a3be4ddf562847d49658b9b68bb5b89b60
font_01_sfnt_off0001209c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209C 4908 bytes
SHA-256: 5cf43ef8e95cf3e4d86438537c93410f7ac9caf5f60a5cb29fa1aa6d1842929b
font_02_sfnt_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 11832 bytes
SHA-256: 3d2f89907864ba28cae03b3f7e863d1e988e35037f6ef1991bbec5dc92f9c2ab