Malicious PDF — malware analysis report

Static analysis result for SHA-256 982bd92062ed0add…

MALICIOUS

PDF

81.8 KB Created: 2021-03-17 18:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3324704e739a845b7183622491492db3 SHA-1: 42e0d6495cec36af5f178720438dab4c90b56120 SHA-256: 982bd92062ed0add3440b6341f3dcd8b60a54e8954bf4c1e9a238b70cff31aa9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains or are part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or serving a secondary payload. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://jumiwimov.ru/strik?utm_term=what+are+the+stages+of+grief%252Fbereavement+according+to+kubler+ross PDF link annotation
    • https://kexoxuneve.weebly.com/uploads/1/3/4/5/134501441/xaratumunali_ronazotorijame_gugunapodamox.pdfIn PDF document text
    • https://xunusavijogomos.weebly.com/uploads/1/3/4/7/134702941/wegazusiwigegamib.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/2002_ford_explorer_max_tire_size.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/45528347575.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/katedulax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_ff5afe3ea7b442298027af250d009ecc.pdf?index=trueIn PDF document text
    • http://dojopugoput.epizy.com/jenuwinovifumefofuzirarid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ec2151-8a9a-4c1a-8e50-db3994209d82/que_es_composicion_corporal.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/gefasebofulur.pdfIn PDF document text
    • http://tuvalej.epizy.com/63505661031.pdfIn PDF document text
    • http://mitekavutoz.rf.gd/pegiv.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/93016344964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabd4d11-7cab-49cc-beea-8fc3456b7d51/91483170626.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_6625693f55554ce6b3b284ac382c5b43.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_a3ce8438a6144f65ba7df6a76c0e669b.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_e987f97c7bec41b19ed981da8c96d9b6.pdf?index=trueIn PDF document text
    • http://mafovito.rf.gd/besanezekudalikujej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1ccd17-856d-4862-991a-f5778e1775b9/59122565665.pdfIn PDF document text
    • http://tewederukafolez.rf.gd/grim_dawn_sorcerer_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4078aba-79bc-4415-80fd-eda7dc708c64/amsco_ap_human_geography_answer_key_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f30da4-8a27-4c25-91b3-a832432f1909/navazesikisapalamejukugos.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_adfe86a2aaf8481ca0205e3d48d1c1e7.pdf?index=trueIn 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_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 5748 bytes
SHA-256: 579062220b546d84ad796e977981fab7d896651c8b52cc5d9390d271930bebc5
font_01_sfnt_off00011143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11143 11212 bytes
SHA-256: d07a9bf729d7bf7a07313ad29f03bfe021ca706d9135709c1502b1e30ba759c4