Malicious PDF — malware analysis report

Static analysis result for SHA-256 2570cbaf5275e505…

MALICIOUS

PDF

106.7 KB Created: 2021-03-24 23:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ecb73b1190418411796e536d7486a08 SHA-1: 6bd045f3b6a0d51b3600d0fcf4c2409bb0c91799 SHA-256: 2570cbaf5275e5054ded9503bbf2a5027ccb7ad9d88a81a40b8b454859861c33
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=clue+scroll+master+help PDF link annotation
    • http://ru-1.casa/80798930937ysno1.pdfIn PDF document text
    • http://boevoenlp.com/7289748317pwfbg.pdfIn PDF document text
    • https://jedapozopimu.weebly.com/uploads/1/3/4/6/134614290/3737226.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/tutabukujomobir.pdfIn PDF document text
    • http://onlinekartiadesi.com/66334735360748dl.pdfIn PDF document text
    • http://sfr-espace.best/treasure_island_books5ein.pdfIn PDF document text
    • http://hookup754.fun/745763350726z3om.pdfIn PDF document text
    • http://xonirur.iblogger.org/8639317382.pdfIn PDF document text
    • https://sesuxaned.weebly.com/uploads/1/3/5/3/135349378/3070662.pdfIn PDF document text
    • http://gooddevice-online.com/economic_development_grants_massachusettsdl4q7.pdfIn PDF document text
    • http://matroskin.space/checks_and_balances_chart_answersndebi.pdfIn PDF document text
    • https://puwakama.weebly.com/uploads/1/3/4/4/134474688/sofopenabab-zofepimosigut-nujavoxawisa-xukuza.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/safazituw_virizexi_jojofobudugel_vejujola.pdfIn PDF document text
    • https://vadizomozizi.weebly.com/uploads/1/3/5/4/135400682/sipugozidemizul-borevexaxiluw-wefasakalafo.pdfIn PDF document text
    • http://wide-mean.top/what_are_the_5_love_languages_in_a_marriage_quizqs5uv.pdfIn PDF document text
    • https://siragakepog.weebly.com/uploads/1/3/4/8/134890789/1825408.pdfIn PDF document text
    • http://italonewsero.site/tusidovemiwusumegipupufojjn5t4.pdfIn PDF document text
    • https://mabodezi.weebly.com/uploads/1/3/4/5/134590290/xorepisubepozave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/08626bc0-b325-49a4-be7b-23ca1cca5ba8/tekefenovuluno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16602605-e85a-47cc-898c-2e08af806ca7/gujosifamufefi.pdfIn PDF document text
    • http://wudafozejuniv.rf.gd/xopafudilowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d91ce2-4620-4614-93e5-e84071d4d6f5/sokudurulipuruzejip.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_off0001581c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581C 4924 bytes
SHA-256: ff3267fac703d2ded54f9401aa753343425dd6cb6690ce95e1ef30ec87a7e4a2
font_01_sfnt_off000168d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168D9 11140 bytes
SHA-256: 96f4a671d71467eb6987ae25b4d19b835074a5f772460b0b1010da76811a8246
font_02_sfnt_off00018ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EC9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3