Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d09c531cb782e3…

MALICIOUS

PDF

47.8 KB Created: 2020-10-15 06:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 17ae28000988d4756d6128f56babe8db SHA-1: bd8380c8ab256d2156edfedf7acd2f359d1b0831 SHA-256: b8d09c531cb782e3d5c265126636209623037d3d061ab5767054231ab9478456
224 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous URLs that redirect to external sites, likely for phishing or malware distribution. The document body and embedded links suggest a lure related to a game mod download, aiming to trick users into clicking malicious links. The presence of multiple redirector links and a link farm on disposable hosting indicates a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?keyword=gta+sa+lite+mod+android+gamer In PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/sixewanosapunu.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/ebaf340.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/varerezakatigoz_teduso_gijilitided.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/2ea9bf5911bb1bb.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/fac6ca.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/xovamelobasojison.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/segaboseze.pdfIn PDF document text
    • https://site-1044184.mozfiles.com/files/1044184/muvutel.pdfIn PDF document text
    • https://site-1041491.mozfiles.com/files/1041491/putofozageteror.pdfIn PDF document text
    • https://site-1038611.mozfiles.com/files/1038611/96486684124.pdfIn PDF document text
    • https://site-1043330.mozfiles.com/files/1043330/tuvakutitaxelo.pdfIn PDF document text
    • https://site-1038830.mozfiles.com/files/1038830/puwuzaranerege.pdfIn PDF document text
    • https://site-1039320.mozfiles.com/files/1039320/wevadoporisobalegax.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/vefikejerosuf.pdfIn PDF document text
    • https://site-1039198.mozfiles.com/files/1039198/nenapake.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/106afe67-e2f4-4531-8ae9-467a3774c4a1/vaxanafejoropabanifebop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be73ae0e-7eaa-4eb9-92f6-f199088d86b2/kibuxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8493/7900/files/77923697959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6858/2809/files/canyon_county_current_arrests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5654/3944/files/useful_expressions_for_speaking_fce.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3256/2840/files/aircraft_structures_david_j_peery_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/nesekugu.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_off00007b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 5176 bytes
SHA-256: 8a70627f7e00f1fe1ca91fb5b2ece458a2cb03b671daaa32ff775b8047b43649
font_01_sfnt_off00008cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFD 10692 bytes
SHA-256: 0d941c8b5c4f441c3e0f7e17427553828c56a7dba9965e475cf64625835b3e66

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