Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cadea1949220e56…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 23:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5e26f48fd481004f299f7e2b2a8aac20 SHA-1: b51b7392bff35686f00d1bfadf5b90430c82436c SHA-256: 6cadea1949220e5635b45a967e23d150e430ce8de7c37f43bd34483f31fa4b04
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'neck rotation' and application metadata, which likely serves as a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=how+to+improve+neck+rotation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5fef8332090c5.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/47582192952.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/miller_syncrowave_250_dx_circuit_board.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413112/normal_5fe1ec174c33e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_604912835cee2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5fdeac46e28b8.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/76915119468.pdfIn PDF document text
    • http://rokagovisalojop.iblogger.org/atiker_lpg_software.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_63f8f8892fcd420784ebfe42c471fe28.pdf?index=trueIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_998793c825ac41d680cba981096d6f9c.pdf?index=trueIn PDF document text
    • http://bulujulu.rf.gd/tadisagenugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdd2d00-d571-44ee-a51b-4018fa0c5470/fedex_international_tracking_customer_service.pdfIn PDF document text
    • http://navezep.epizy.com/11238601365.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/yoga_asanas_images_with_names.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/united_nations_17_sustainable_development_goals.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_80e0a34a88a546b4a841cab410e4439d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3adea8d-00f4-4489-8e2f-48fde53efdb2/holley_hp_efi_tuning_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67d3eb1-26a0-46a4-8986-3888b0d77214/what_happens_in_the_rapture.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_78c30c929ce9437d9125096ef912e37e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbfd503-8feb-4f0d-b9c8-11fcf4520062/sivezovekuwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/guvagukuvomi.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/38556411802.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/voxefunuxiden.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_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 5048 bytes
SHA-256: e159dc8e4ea9da6a0bdd8f479cc43fe12d1eb3d8e978384ecf20878472238e2c
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 10800 bytes
SHA-256: 445ceee74734094d8e00fb43cfafbea632468f22112d25201c4062a2de0b6319