Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f656f1d33feb228…

MALICIOUS

PDF

63.2 KB Created: 2020-10-17 00:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 18d8cd388aa3b1342ae213bd4dea4cbf SHA-1: d5290eb32dfad92b102c36842f732b4ef8ed1ced SHA-256: 7f656f1d33feb228a24125106ca349d1b8d9356eb74866d2ff235d317b19d034
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector domains. The heuristic firings indicate that this is a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' rule. The document body, though heavily obfuscated, contains a URL that aligns with the identified malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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://ggtraff.ru/123?keyword=enhancement+shaman+guide+8.0.1 In PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/e12d4ea5c9e5.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/karilikalim_pasixuzamozib_vobosekipepele_lixirilajuvi.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/vidukokosabe_vuxewopopazese_zexel_letawo.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/fizusirepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f89b969945a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f8743b74619b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f89df9a9b97c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f88bcfb415ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f888670c2d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f89dcaf74806.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/ruxozukozuvazu.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/8d9293d8e.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/3787099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4a4545-6b74-4770-b7ba-726bddda3f46/puxopewuliturakutodoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a82456-0e28-4b6f-b91a-d9c14ef884e0/dujopozekege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f4f3b1-fc30-436c-abfc-d4e73e0d2969/gepum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be95de3-882e-4691-a918-a5152ec7fa5a/femitenopewokajuxexofeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd434e9-f8bd-4f53-a0ff-7c4a0a4303c4/12779463753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4418/3459/files/malajukevenigabeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5327/7088/files/porter_cable_radio_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7127/7722/files/world_market_coffee_table_live_edge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7498/6399/files/the_ultimate_chemical_equations_handbook_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA254 5600 bytes
SHA-256: cdd893f001a6103d6e5d99d7d0e060077a86b82c4ff3e63a59e46efd8b672f48
font_01_sfnt_off0000b539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB539 10252 bytes
SHA-256: a6044d701b0fdcd9bbea4b6187d920058de5fc20352366774ab01bb52fdf8588
font_02_sfnt_off0000d881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD881 16400 bytes
SHA-256: 44f9fd5195cf255265141daa3116ced55768786d3392a002edcbd73ee4379139

Open this report in the interactive analyzer, or submit your own file for analysis.