Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1929b6606211c1…

MALICIOUS

PDF

111.1 KB Created: 2021-04-08 06:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9c272b02e2b585f9428c56f03aeed382 SHA-1: ac7dec86bebb6611413a5b2871ea94c66862cf5c SHA-256: 0f1929b6606211c10416738aece5171b7af26f143088f52bd07bc8c308057066
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to its creation, which does not directly indicate malicious intent but supports the overall context of a crafted document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://botokaw.ru/wix?keyword=bon+voyage+level+2+revision+a+answers PDF link annotation
    • http://rivozuzeno.mywebcommunity.org/belimbing_wuluh_untuk_hipertensi.pdfIn PDF document text
    • http://deromgroup.com/rabolidobepor4eb18.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/stay_hungry_stay_foolish_telugu.pdfIn PDF document text
    • http://salimom.mygamesonline.org/genetic_causes_of_cancer.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/8229038.pdfIn PDF document text
    • https://gapotijaj.weebly.com/uploads/1/3/1/3/131383657/6903966.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/juxuniki_xumogopivonifu_mepujavi_fobipej.pdfIn PDF document text
    • http://virivuluk.getenjoyment.net/zoology_general_knowledge.pdfIn PDF document text
    • http://fakts.design/44175483644hgiio.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/43729209528.pdfIn PDF document text
    • https://buginibonimej.weebly.com/uploads/1/3/2/7/132711973/lijojej-rogoruvimuv-tukaret.pdfIn PDF document text
    • http://kexawez.mygamesonline.org/zexifajekixadezotesi.pdfIn PDF document text
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/bec202990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwuwijagabote.myartsonline.com/automating_the_boring_stuff_with_python_free.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa559c1b-bf6a-48bb-9412-f6f56c0a2d4c/why_is_uppababy_vista_so_expensive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c814b1-05d6-46d1-a119-7fe1d1e4abdb/new_york_dmv_learners_permit_book.pdfIn PDF document text
    • http://romepasuv.myartsonline.com/coindesk_state_of_blockchain_q2_2020.pdfIn PDF document text
    • https://f187853a-68e6-4ed6-a420-9593b89d6738.filesusr.com/ugd/27c34a_00a2fe9cc51445acbcc32357cdf4df32.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_fab3fd6e61204730b5ef33dae042cef9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c9b8fa-d194-4aeb-8a42-48fc65576667/nawubi.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_9f66c18c2dc74beb80527c8cfbd1a3e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb47a6c4-4da4-48f3-9dd3-2037547c9b9d/what_are_the_five_constant_relationships.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_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 46060 bytes
SHA-256: 869c223a2bdafffb60f784cfa04704c99a509920132304a37e41b4b77525e957
font_01_sfnt_off0001789c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1789C 5288 bytes
SHA-256: c0da3b90eb71a0726e76e3e31db19bc45704177aed24ace9caf3b43d77d00de8
font_02_sfnt_off00018ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ACE 10456 bytes
SHA-256: 5608138a04c0565ce5cc45105978c9b02afde9cb3638e130a86fa6344ed17577