Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5315ceb6ab62f3…

MALICIOUS

PDF

81.5 KB Created: 2021-02-15 14:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 787653bd3263e13eb87583d48a9a1db9 SHA-1: ed1867b76a7e7c27da11cc198fc7d57cda0a42f2 SHA-256: dd5315ceb6ab62f3a54cb9a4eeaf3e9038a20f652c1323632861d813a0d40963
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/aws'. Multiple other embedded URLs were also extracted, many of which are flagged as unknown reputation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=what+kind+of+oil+does+a+2016+toyota+corolla+s+take In PDF document text
    • http://pogadai.xyz/524528496371bla7.pdfIn PDF document text
    • http://babbieshop.ru/fodmap_grocery_guide_appjmvj6.pdfIn PDF document text
    • http://glossywp.online/koloxarefiy3wy.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/Yhjgfjb/bupitonaforakeni.pdfIn PDF document text
    • http://m-ryanaf.site/9649755166r0ugj.pdfIn PDF document text
    • http://websecurer.tech/performance_appraisal_objectives_pptvrx66.pdfIn PDF document text
    • http://operationhomeplate.com/nofesawor1sqgk.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/jatT3hi/prison_break_season_4_episode_12.pdfIn PDF document text
    • http://harkateine.fun/zobipel5fhh9.pdfIn PDF document text
    • http://ehaberdevlet.com/melbits_world_playlinki0r9t.pdfIn PDF document text
    • http://remastacer.com/notification_firebase_android_studiox3xet.pdfIn PDF document text
    • http://trastenmyqort.online/blockchain_for_beginners_mark_watneywc3ff.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/rViagcn/adderall_generic_dosage.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/hdibCha/sikipinuleki.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/lurutopobi/donamuzagogivamofezefe.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/93801612156.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/abbyy_finereader_12_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/dot_grid_paper_template_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/piezo_vibration_sensor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/74898134645.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_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 5768 bytes
SHA-256: 206c7940f07e5ce2e5ff492262a6d96ddbab2ff38fb66ab124d37e9dfd21aa27
font_01_sfnt_off000114b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B1 10336 bytes
SHA-256: a355ec5d0b0628dbdcacf27d447923dc87df319f73d83ee90b8b0e619822f44b

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