Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5de8c1e53cfea66…

MALICIOUS

PDF

70.9 KB Created: 2020-12-31 23:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 92b7f112c5be00bd8dad42802e1d1b2a SHA-1: 8505a1a9d597f53493261b500caa6f235d0be3de SHA-256: a5de8c1e53cfea6692bd6d627343c259f0d32ff477666e382b50c0fea5689fcc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL points to a phishing lure designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=soccer+stars+unlimited+guidelines In PDF document text
    • https://cdn.sqhk.co/molofagaji/GjagcGL/wifigosotakutarufi.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/fjfifij/nasal_spray_covid_ucsf.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/hihhacO/nowejamogefal.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/8xQibzn/kutazanutuvukizagogitate.pdfIn PDF document text
    • https://cdn.sqhk.co/miloniwuwave/bgfc4T4/annoying_sounds_for_dogs_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/cgfbegf/14577171527.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/Ukok0yB/fancy_text_decorative_fonts.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/kijhayM/stormblades_apk_full.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/DN2nmgh/93448305385.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/0e621f76-394c-4f0d-86b5-c52ab39ce1f7/classroom_management_plan_high_school_math.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/69053799565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d359adc-691b-4849-9215-2c22716c99d2/74285500810.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/pacair_range_hood_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/jaziguwozafiwer.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/25467062399.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/xaxumapi.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/jadebubilisoxarekoxor.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/disigarululatit.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_off0000cc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC63 5244 bytes
SHA-256: 0530b463621467d4f2fd3af4e7cfeda5fd164c44db7ac0788044fdf3e14f9a3c
font_01_sfnt_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 10080 bytes
SHA-256: 775549cea40d1eb40cf3e7417503cbd1482411d62e01005592aeb473c2791eb3
font_02_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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