Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f12d486a7d9bcce…

MALICIOUS

PDF

83.7 KB Created: 2021-05-11 15:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 01140d0178721d006141ff2f40cb0419 SHA-1: 197c1950c69030582e2fd592863c03507456b6ad SHA-256: 0f12d486a7d9bcce52e401f0f84be5f84c496eb35aaf3522f9a1d97fa83d5280
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the overall structure strongly suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=my+cloud+ex2+ultra+usb+connection PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409799/normal_604da9164779b.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/3917509.pdfIn PDF document text
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/vedajiviwigif.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/1088617.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/critical_theory_today_chapter_2_summary.pdfIn PDF document text
    • https://zalidumi.weebly.com/uploads/1/3/5/3/135351231/4941290.pdfIn PDF document text
    • https://babixedijifaz.weebly.com/uploads/1/3/5/3/135385025/reridak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_601a9e524f03d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403260/normal_60037d865625a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5fee003be2cae.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://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_fd2cd12b192f44f9a008d469306d0669.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_ee1da11828be4fbc904ffe0f681a2eda.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e962847f-5376-4e07-a778-7176cb429fef/dyson_dc41_power_switch_wont_stay_on.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/4663152824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f22114a-80b0-4a28-9474-14cbbcf595ee/tegez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad31e3b-ac01-4046-8e7d-d6a4a39b087d/24141020588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe2c96e-f351-4175-8104-8506891dc036/96870242125.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/josawukilozaf.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_9d4e4645283348b6926079eb9d86c07c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/54350277187.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/how_to_help_with_childhood_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/wokuwekolilimon.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/40619163848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc69b5ad-b37e-4f29-aefb-d7d33f9d622c/what_is_the_best_book_on_wattpad.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_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 5260 bytes
SHA-256: b3a4c5863226b6108970fd70f38be0d2ccc15acee7cfa8284e8d2b2f4898d453
font_01_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 11844 bytes
SHA-256: afc280709079f9b3f5556f7da2a84ddbfd8a5af333bfb1d1a9aa55eb22e51d8c
font_02_sfnt_off00013329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13329 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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