Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2a45f21c3d3aa9…

MALICIOUS

PDF

77.1 KB Created: 2021-01-24 16:08:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 69837864d80e693090cffb02c32c78b1 SHA-1: b7c3c94813e6c8ae1cb66b55ae6d3720d51e27ba SHA-256: 6c2a45f21c3d3aa996f79458e772e2c42e009a4df90c1af8002e4acf4941d965
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious sites, possibly leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=gshock+mtg+900 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367283/normal_5ffac33355116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5fed09e14b49b.pdfIn PDF document text
    • https://vetedikagumon.weebly.com/uploads/1/3/1/4/131453784/nofevifinaz-wubaj-girebasupos.pdfIn PDF document text
    • http://kino-vezde.ru/votejukejalagakatoza1me4.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/fxadgju/solulidorutes.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/0561c2ef3ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415962/normal_5ff92bc49feb7.pdfIn PDF document text
    • http://osummer.space/castle_storm_2_ps4_review40vcl.pdfIn PDF document text
    • https://cdn.sqhk.co/foletesubuf/3PigMf7/78345592597.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/sokobepenufi5lf1h.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/hgJkgjW/xegesorezibavu.pdfIn PDF document text
    • http://winoorama.space/weather_station_wind_directionnutqt.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hgfFifW/repost_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/jcheiaw/dasofetagugesiwenotu.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwasowoset/g3jjjd4/gofegajozu.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/5ahacig/tokinuwe.pdfIn PDF document text
    • https://rojanekawuveruj.weebly.com/uploads/1/3/1/3/131380666/c7edff79fb.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/L2AiaO9/first_strike_valorant_bracket_liquipedia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/zurovajij/fimuroxif.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38D 5268 bytes
SHA-256: 0df6c824d8d6176033ed63b1de9bb7529cc4aae3c330183c1840f68993eef724
font_01_sfnt_off0000d55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55A 4544 bytes
SHA-256: 7addde749495c41c844635816c20aafd96180fbf5fffdc71f63de9ad118ee6d5
font_02_sfnt_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 9808 bytes
SHA-256: 41d8b974497f387684491e3fd7fb59240f05c63040456f10b90b90fe2cce39e0
font_03_sfnt_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 10624 bytes
SHA-256: 35817700c61dd2e2384f6b0a3164c22ff06f02306ce7009156d46bed8283e7a6