Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c0c034f6036769…

MALICIOUS

PDF

79.9 KB Created: 2021-03-17 00:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d7fbb817e22200713629cedbe6b96c49 SHA-1: 0c6ec530abc824b79d4015eb03f3e3b8a290a610 SHA-256: e8c0c034f603676902c4dfbbd4cdb70714ac012affa0e064703bd3154d3519ee
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains numerous embedded links. Several of these links point to known malicious redirectors or disposable hosting, indicating a likely phishing or SEO-based malicious link distribution scheme. The document body contains garbled text, suggesting it is not intended for user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=singing+machine+sml385btw+manual In PDF document text
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/287574.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/autumn_leaves_sheet_music_guitar.pdfIn PDF document text
    • https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/goviluwowewumi.pdfIn PDF document text
    • https://zumokijux.weebly.com/uploads/1/3/5/9/135966910/fowepigubaririsew.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/6962795.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/52599561340.pdfIn PDF document text
    • https://buxijabis.weebly.com/uploads/1/3/5/3/135329720/ebacdc6ea857.pdfIn PDF document text
    • http://bit7.top/rezukodikukaririfabjbogs.pdfIn PDF document text
    • http://mihetos.xyz/zetefepenogencv1.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/mokasetumu.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/fezej.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/software_quality_assurance_management.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/27250695293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/71b54ae3-497e-4109-9fb5-04293ff03d56/tecnica_de_primeros_auxilios_psicologicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f30ee9f-62f0-4358-b123-83db8c9ebef9/mtv_challenge_inferno_2_full_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc4d342-58f4-4ff9-a21a-4b1b1b395a7e/17628751593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e105c1e-322f-42ad-b858-116d114b6368/hallelujah_chorus_violin_1_sheet_music.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_off0000ea1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 5708 bytes
SHA-256: 88fd6ef0507a903d9b1b99a518cbb4f23bba74034e677c2cde296ed8c91c17b1
font_01_sfnt_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 11488 bytes
SHA-256: 9edfdf0df3e0d9e37b71081fc4aaff27f43b0e5a64879fe634077e7ff424f401
font_02_sfnt_off00012491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2