Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d96b95f151a4e6…

MALICIOUS

PDF

67.3 KB Created: 2020-11-20 23:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 96819d6a9866077e19bfa0e26c732a4a SHA-1: 392259e45f1c7645b54bf3d443f949c9e14ba248 SHA-256: d3d96b95f151a4e6fbdb198cc3d58b8cf977b6a197f3759c48beb4f442843558
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, indicating a link farm designed to distribute malicious content. The primary malicious URL identified is 'https://traffine.ru/123?utm_term=heaven+is+for+real+children%2527s+book+pdf', which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to a children's book PDF, likely to trick users into clicking the 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://traffine.ru/123?utm_term=heaven+is+for+real+children%2527s+book+pdf In PDF document text
    • https://kiwusaxanasatip.weebly.com/uploads/1/3/0/7/130738973/dabb6dee07607f.pdfIn PDF document text
    • https://jimitorivav.weebly.com/uploads/1/3/4/8/134878901/9547507.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/7422174.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/legubonu.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/zarep.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/7707475.pdfIn PDF document text
    • https://newowuwaw.weebly.com/uploads/1/3/4/6/134634034/mogojewab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/49609528497.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/bharaate_kannada_movie_songs_free_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafc4e57-494b-4b13-bb73-9c51825d4663/pezavuxunepolajovalak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996e9b59-6dac-45ef-bd9e-5433267b7ff8/46949554942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9bfc68-35c9-46a0-aca3-e8a23c957047/17099454474.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/58348683461.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/manual_for_instant_pot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18dd391d-76c6-485c-9f5f-1e89f9513942/zosakupinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7eabde4-7007-4668-afef-32e07edf1ab1/81856654953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad981d4c-4338-4eb2-8eef-41696b42ce4a/digelinotaluvatis.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_off0000c9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D9 5500 bytes
SHA-256: 0d69b01d072a4fcfa23292b09261843a840acee91c08ff52d8c1974a7bc7f2ab
font_01_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 10492 bytes
SHA-256: da95382b89e4fd71116b211e62de17a4a3e794f7c6c2e0753d0c6250b0ba9cc7

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