Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0853fe3083b302e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 03:36:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8d183bac4672aaf0a49837332848aec SHA-1: e3a4f147dc5b33577b3cf9c8ca2c4f9f94d52ea6 SHA-256: f0853fe3083b302e720f264ba21d388378b85fb0d88bf1f0cae85106eeff86bc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=probiotics+pdf+2019 PDF link annotation
    • http://vuwimoxit.mygamesonline.org/92448873740.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/zawus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486354/normal_5fca5f7386a4a.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/55406579828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415292/normal_5fe52ce50f80b.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/sejolowogizi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_60089fc4e33dc.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/hhAeRo5/words_home_crossword_puzzle_game.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/71624864451.pdfIn PDF document text
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/8bc4de9cd52dbf.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/ibIWu1w/boomerang_tamil_full_movie_free_download_isaimini.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/jovekus/95360521854.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/besajijapetovotisowimuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/grammar_check_ginger_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/android_9_clock_always_on_display.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/wazapotigapepipegosifof.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/basara_3_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/47846012496.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/pixinasemoxozu.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/33821275529.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/guidelines_for_medicare_part_b.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/zozuzeluwuvudawuwabo.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_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5528 bytes
SHA-256: 7031aaa0d6a77a3abfe242daf24c119d62b3a5bbad9452d56c5737327ce12055
font_01_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 10728 bytes
SHA-256: 4e5629d10d4e353c86a66a6d640a7917fca5a8128f371bd46532bf2b29259e54

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