Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c0b8960c6fb865…

MALICIOUS

PDF

74.6 KB Created: 2021-02-25 13:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e5a918a6ece4bf1d01e2ca8011f90386 SHA-1: 72f5e0dcc54bfc72affc38bcddfc7777a4b6b365 SHA-256: c6c0b8960c6fb86522ad12246f9c96f6e6d908f51c447c25e2820b5c119591b7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=d%2526d+3.5+mago+specialista PDF link annotation
    • http://itayoga.space/fool_for_you_snoh_aalegrakqhvm.pdfIn PDF document text
    • https://cdn.sqhk.co/ragekasa/dgNKi0P/natasa.pdfIn PDF document text
    • http://dijepitezuk.22web.org/can_i_make_money_trading_penny_stocks.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/jiCaiiD/paxuxip.pdfIn PDF document text
    • http://tikovg.xyz/badowejulorefeneruaq6r4.pdfIn PDF document text
    • https://cdn.sqhk.co/vivijuzajus/hhTgchi/80207000577.pdfIn PDF document text
    • http://vipmanmarket.space/15044056796hat8s.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/lpUhidX/64126893783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_6026fc8fac740.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/sThdyrR/ivory_ella_hoodie_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/fiiihle/final_fantasy_14_ivalice.pdfIn PDF document text
    • http://sayfelengs.space/history_of_european_union_timelinepxzx2.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/6ghhaNB/fabfitfun_fall_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/9hdgdon/nuvalatijafo.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
    • http://vitivagi.rf.gd/tujimubomamotuwejusuwaba.pdfIn PDF document text
    • http://jimakobogugiwa.epizy.com/43112516456.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/89069994827.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_off0000e0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D8 3484 bytes
SHA-256: 8e9e82eeee626ae3cf90455cd7f2f0b0f68513c2b5b541aa2122e86371f46d9f
font_01_sfnt_off0000ec45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC45 10460 bytes
SHA-256: 8ac345c56a1250deaf0bb86a3df6edbff4ef308ad885fc65806c44338d5b1f09
font_02_sfnt_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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