Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9d0c4fc70ee734…

MALICIOUS

PDF

79.6 KB Created: 2021-05-22 21:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 03320d9297ba9e4a98fd2674c311c1a0 SHA-1: 217dadee4dc7bb6ed4ef0c998824a18f5490e7c0 SHA-256: fb9d0c4fc70ee7347b763d29b86100e9efec25df3004c6a66ad072e324e028e3
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are to unrelated content, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and external URI firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=how+to+paracord+wrap+a+tomahawk+handle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391001/normal_606e0d886bec8.pdfIn PDF document text
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/xegaje-xewiguvosaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_600f5c4d46b20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5fdd43d57bb15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409096/normal_603f467f7b608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5fec677ad557b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449001/normal_60064c8e7b813.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/xavevojalu-taguxevor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_605476232dee6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kibavutibeved/76139950594.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/fawabafosoxaxidosux.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/muzzle_flash_pack_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/big_data_hadoop_video_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/24171761327.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/archeage_abolisher_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/jalaxajujawifegisusudopen.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/game_tester_interview_questions_and_answers.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 4992 bytes
SHA-256: 5826d3ea2a72edec74c2fb540232a113515391c29b36a8cd8f8a02f4a5072dc6
font_01_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 6096 bytes
SHA-256: b6bc008f4a9a594806ea043708447457988da58ef31dbf4f91ac9613f014d74c
font_02_sfnt_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 10108 bytes
SHA-256: 9fdcd8440d7de77c2c6bf3f17f40555d4d7d04d92611674e94c4bb2f97f0ffa5
font_03_sfnt_off000122f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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