Malicious PDF — malware analysis report

Static analysis result for SHA-256 126ffcef929f425d…

MALICIOUS

PDF

72.5 KB Created: 2021-02-27 00:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fc23c52752e5fcf1e22273bfdfccbe4f SHA-1: 0cbd76ebb8447a0937d661eae80d1879dbcf4ac1 SHA-256: 126ffcef929f425d4a5941b47227c79d6c829a4ff892fb2073fcc5792c4d9db5
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to distribute further malicious content or phish users. The document body, though partially corrupted, contains text related to 'quotes' and application metadata, which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://midufefew.ru/123?utm_term=love+and+respect+quotes PDF link annotation
    • http://libralab.digital/dowepuboxelozo24fx5.pdfIn PDF document text
    • http://gratoraama.website/maruzijig049kt.pdfIn PDF document text
    • http://moneymaya.site/mecanica_de_suelos_y_cimentaciones_crespo_villalazhse64.pdfIn PDF document text
    • http://vwwv-avito.online/84039296338namqj.pdfIn PDF document text
    • http://it50disconto.info/31668156437ei5js.pdfIn PDF document text
    • http://prizinsta24.space/armenian_music_free0w3xp.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/WEdhbJu/restaurant_story_2_designs.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/38785315755aevx7.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/transformers_revenge_of_the_fallen_21_gunsxk9bn.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/CNjatrp/40758006391.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/giWhcje/swot_analysis_template_word_2007.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/ehhazhb/splendor_board_game_rules.pdfIn PDF document text
    • http://kkkirrreeee.space/ice_cream_maker_summer_functionbh57l.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/lhgVibc/mufirosunoradixamirotik.pdfIn PDF document text
    • http://bilkaita.space/5724454491110sei.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luviwozota.rf.gd/88293945881.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_off0000e0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A0 5164 bytes
SHA-256: 62910f0f1fec369f4fe803ec5718c4b9005facdefd576f10cfd18fefe63625ea
font_01_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 10244 bytes
SHA-256: 4f2b72c21aeb6dc53121608629ad9499cdd5d71223b52e4cd157620572c69872

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