Malicious PDF — malware analysis report

Static analysis result for SHA-256 352c38cc269da338…

MALICIOUS

PDF

77.9 KB Created: 2021-04-01 03:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0af3e5764690319c388b83185852be34 SHA-1: 32381a064fdadd6af320778cb7b3c84ae17bf771 SHA-256: 352c38cc269da338e6560a915504033784b917f50764b272cc4702736073713a
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://yafferge.ru/wix?keyword=crazy+things+in+the+bible+that+are+sins'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious URLs and the PDF's nature suggest it's a phishing or malware delivery attempt, likely distributed as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=crazy+things+in+the+bible+that+are+sins In PDF document text
    • http://euromarket.pro/soul_hunters_wiki9o9z2.pdfIn PDF document text
    • http://tizezs.xyz/preschool_homework_packetslspgq.pdfIn PDF document text
    • http://wumokejo.iblogger.org/73247779181.pdfIn PDF document text
    • http://latujor.22web.org/tolozuxiwukorujujajikoz.pdfIn PDF document text
    • http://antinomi.design/garena_lol_update_stuck_at_95sxwz9.pdfIn PDF document text
    • http://creamwalls.space/tecumseh_engine_identification_numbersmgyj9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipesajiwe.epizy.com/mozosufon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6f6b09-10d0-4a5e-a4f9-cf3b86fe71ff/african_american_praise_and_worship_songs_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/books_similar_to_the_german_heiress.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/diputokuxaxukeziv.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/ratipovubukesuvobumafabil.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/98241063886.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/siwonemagosuzavuw.pdfIn PDF document text
    • http://jomosufikopa.rf.gd/java_programming_basics_udacity.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/jijawomilokomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc3482a-cc93-454a-9a67-b1f840d9595e/xuverusuwavo.pdfIn PDF document text
    • http://fisumude.rf.gd/zobafebezepewit.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/gimp_download_mac_os_x_10.7.5.pdfIn PDF document text
    • http://juzodut.rf.gd/differential_pulse_code_modulation_theory.pdfIn PDF document text
    • http://mutazuvedimirob.epizy.com/djembe_drumming_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/malaguena_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/june_tailor_fusible_cotton_fabric_sheets_instructions.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_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 5144 bytes
SHA-256: b14989fb7a6db4785a5512e51f2264e6a685bb37d8016e475e48a52a035d36a0
font_01_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 11212 bytes
SHA-256: 983a3d6d9b2a01e89f8155f0d1bd0371ae174087bb9c9d8038e1b9fbc1678ab3

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