Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15af4e688939dbb…

MALICIOUS

PDF

71.1 KB Created: 2021-01-04 18:38:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0c1ae8eb51d75b548b6d9a9a732a955f SHA-1: 7bda7ca7d727871842812041c60e27eda5c92746 SHA-256: c15af4e688939dbb58b43cb5b7cff3ec7deda1e43a990d82cbf90b77de917e37
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text related to 'Vicksburg battlefield tour guides' and is associated with an external URI pointing to 'trafftec.ru'. This suggests a phishing or malware distribution lure. No scripts were extracted, but the PDF structure itself likely contains malicious JavaScript or exploits.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=vicksburg+battlefield+tour+guides PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26093847-0277-47a1-afb4-cffd4db8f319/american_football_legends_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0d89f5-b027-4ae0-a56c-36adffe22513/85677971183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f51ddb8-8327-4795-9405-adf22daa43e2/39795219530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870492d1-16b7-40a0-894d-c8f5558432de/ezcheckprinting_version_7_license_key_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/multiplying_worksheets_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/smoke_gets_in_your_eyes_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8c67a1-787f-49ce-b7c3-1c9739412200/vifusevezodezilotita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cb3396-29da-4596-9b44-ff8fde905bdf/61904230310.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/blue_gold_world_water_wars_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ed3734-9792-48dc-893a-32a62bb1a6d6/teslaunread_apk_android_4.2.2.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/javascript_submit_form_with_button_name.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/84508959958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3722fe6-d639-4117-9ddd-bf7bf5a41bdc/tesibuzaroju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4f3404-dda8-4cb1-8019-2abe997280d9/pokemon_red_rescue_team_codebreaker_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3292dd-1dc8-46f6-aaee-e85d03ee1d93/kakovesugorazu.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_off0000d87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87D 5360 bytes
SHA-256: 864f03333ce4e0f6a1c5d760b68a9586ea6fc4a1476834bc835bfd35979199b6
font_01_sfnt_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 10672 bytes
SHA-256: ef11dde79e121ba78d0d5c5ec1b2ba7a198440a263766801e5041106d82533be

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