Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94e42beb184599d…

MALICIOUS

PDF

74.8 KB Created: 2021-01-28 03:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 05e3c4654179f52d3527d5bc0a3b7910 SHA-1: f1545640c0bafb50b1ba3a55a182160f993ce056 SHA-256: d94e42beb184599d3061caa7ef4e63a1186b1b2f72caa0a083a75063f1d7bf3e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/123?utm_term=d%2526d+4e+warlord+handbook'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the redirector heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/123?utm_term=d%2526d+4e+warlord+handbook In PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gUhAjdA/54687723755.pdfIn PDF document text
    • http://bella24.xyz/844113107174mbyg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458833/normal_5febe7c2b2cf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385887/normal_5fc5c33641856.pdfIn PDF document text
    • http://sosunimepewe.22web.org/claremont_ontario_weather_report.pdfIn PDF document text
    • http://instacopyrightcenter.com/part_time_jobs_san_antonio_college_studentsay03e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501385/normal_5fe24bbda640d.pdfIn PDF document text
    • https://cdn.sqhk.co/jeposanop/jUiijaA/jumpstart_1st_grade_serving_up_fractions.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/iFm81je/rock_climbing_near_me_for_adults.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5ff9a44509183.pdfIn PDF document text
    • http://yourlivehelp.com/42151844146i39pz.pdfIn PDF document text
    • http://shoop-fe.ru/56131033423m24vh.pdfIn PDF document text
    • http://lyudi23.ru/ernhrungsplan_anabole_ditjg8ka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lebejos/dojofawemafobujo.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/ariens_42_inch_riding_mower_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/3174619865.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/giunta_middle_school_report_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/kerboodle_answers_physics_aqa_a_level.pdfIn PDF document text
    • http://palomidifigur.epizy.com/marepijefinakabava.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/grammar_worksheet_grade_2.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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 4156 bytes
SHA-256: bb1702a9e9b617346157f9ea6f36cc14559c37d4a4a2cf683ebd57dce9d2c082
font_01_sfnt_off0000f99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 10832 bytes
SHA-256: 3c97c1461daf0dfc474f4bbd1e3da19a7fab835a0aa2e9393d9b15f3b4224998

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