Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe56bc9e1825fe8…

MALICIOUS

PDF

69.4 KB Created: 2020-12-22 06:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6e87f080dc317910df1938f50e2dfbae SHA-1: bfca371d982cb2ef9fb40ebc105ca83d3c8cbf7a SHA-256: cfe56bc9e1825fe87c3347f2ea583e0f1a11785e65a3a44fd70231d08db52785
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 'ggtraff.ru'. This URL is presented in the document body as a download link for a game mod, indicating a phishing or social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?utm_term=last+craft+survival+mod+apk+android+1 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/schedule_e_rental_income_calculation_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f669a9-191f-4991-9d70-a35bcb8fb527/training_day_breathe_dog_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b74b9e-8681-41ad-b3b9-4494218b2f86/big_head_football_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d082a793-ea1c-4ae9-af89-37115b50faf7/19875409659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd67044-a3d0-4913-ad1c-8d196af0e9cd/16272226235.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78fed5c272238a81ad988/t/5fcc6ded2fa8bc6bcde10348/1607233007639/build_a_superhero_team.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afd221c-b111-4b20-ae66-b370c3011375/87243255158.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72439f2297e36a9fcf3c7/t/5fd15216da99ec247ce918a2/1607553559615/virtual_beggar_mod_apk_3._33.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a659f0bf-dfe3-4d6d-997a-0ae43287a408/1631297514.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/free_printable_alphabet_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f4a213-55e9-4573-9260-eaa0717096c5/xumefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc86360-be8c-48c0-8254-24cf56a91da1/bryan_kolaczkowski_rate_my_professor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de1693f-05be-4fb5-8cdf-24db91d5c455/38179179120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f35475a-41fb-4707-9563-d913966b5db7/why_do_gummy_bears_grow_in_sugar_water.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5141627a199023ad05ad4/t/5fc80cd86caedc302dc00571/1606946009254/black_art_wallpaper_android_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09f7090-3cd7-47f9-af9c-f81a834dfe17/behaviourally_anchored_rating_scale_template.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_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 5420 bytes
SHA-256: 2289cec67e6938ca51391eb8b311d971781b40207813eedaa9550f7c64f0c58e
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 10780 bytes
SHA-256: 927781a7f8b171096f7211df2b43e8f2eaef4aa663c9e2f1dade0a76fb5003bf

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