Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab65d22744b8f6f9…

MALICIOUS

PDF

74.4 KB Created: 2021-03-04 08:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b661afae1fe09dacf6d350b3ad0b9a6c SHA-1: a11be650609e91902b7f76ef831787417a9a0646 SHA-256: ab65d22744b8f6f916e17f6cb303eb25f3cff6f1679627b2271660a97cdf12f2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable hosting services, which is characteristic of SEO spam or phishing campaigns. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=kiss+me+chords+ed+sheeran+ukulele PDF link annotation
    • https://cdn.sqhk.co/raxuzuvuluf/pNghSBP/78607479311.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/gjgOFjg/horse_mannequin_where_to_buy_horseradish.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/55544584521.pdfIn PDF document text
    • http://jadebey-x.com/card_scanner_software_for_pcs16wm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5fdb5b27eaab5.pdfIn PDF document text
    • http://pobasomitiji.22web.org/joseph_prince_family_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/ifVjcOL/59649118406.pdfIn PDF document text
    • https://baluwakenina.weebly.com/uploads/1/3/1/4/131437578/tedisuvivurumaradi.pdfIn PDF document text
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/velarezokem.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/tijexowojupop-lovibanow-mazijanutirov-gatomele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_603eaa8be11d3.pdfIn PDF document text
    • https://katutufoderosut.weebly.com/uploads/1/3/1/4/131437544/152490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_600fe336ac83e.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/posigikuxobokiza.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/nagajawera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_6016d1d82f2c0.pdfIn PDF document text
    • http://fumigatoff.online/zinakv6x5h.pdfIn PDF document text
    • https://mujilaku.weebly.com/uploads/1/3/4/3/134389228/9d26757.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/3661782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolakelepexiruj.epizy.com/minn_kota_power_drive_v1_foot_pedal_wiring_diagram.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_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 5212 bytes
SHA-256: 73b3d6bc0312df1b927ee10fe27653528eef2362bdb6bfe02c25273916167dbe
font_01_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 10904 bytes
SHA-256: ead91d4b6747901a7948592bf2f1c46f5f58a7309d4ca2df5e24bcdc28ae6bd1

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