Malicious PDF — malware analysis report

Static analysis result for SHA-256 34be157de72c2c2d…

MALICIOUS

PDF

68.0 KB Created: 2020-12-28 20:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dc40a60a16e64412c076b87530abeed6 SHA-1: 725b0357c51e442b2385c734582aaf5597d9054b SHA-256: 34be157de72c2c2d691ae30fda0b0670960a96fdb0f5f67a5214a1bde9f89f64
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. A critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=wad+manager+1.7+freezes'. This suggests the document is designed to phish users by directing them to a harmful website.

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://gettraff.ru/123?utm_term=wad+manager+1.7+freezes In PDF document text
    • https://cdn.sqhk.co/desiruzag/hXhbieU/fokakupojuvopozuxiwib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5fe388d0694bd.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/fasgdr2/50771240719.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/midizaxopazeji/brics_countries_objectives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ee9900-0cfd-4818-bac3-adcbb99414b5/lofix.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/sajelik.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/tina_the_llama_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee75ca0-c8be-499d-ae86-65c7d04eee2e/86025144600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22602b39-f0da-48c0-8a02-314a170525b5/birth_certificate_akron_ohio_w_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd271f2-fbb2-4846-9c5c-f76597780338/how_to_wash_shutterfly_fleece_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a74e03-e684-4941-8dac-da65f81def7c/18339903917.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/command_for_invisible_block_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f4bcca-c1cf-4d78-a4de-9e9dc1cfbde5/xuruxedemekemin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c0b5a3-a5c1-4e59-ad11-db89e0472526/hope_for_paws_new_rescue_videos_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nogigaxewusesad.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/chemistry_dictionary_application.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_off0000cdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCE 5420 bytes
SHA-256: 89cba0cb284916164e8405b4802a971877d9d5158f494b4b13cd66e2b82bbe48
font_01_sfnt_off0000e050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 10136 bytes
SHA-256: 3c1fe9bfc5fed5b1680aaba3f826e1a0451ef85af9e84655e316355f1aac30c8

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