Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dfb81d72ed4745…

MALICIOUS

PDF

93.1 KB Created: 2021-03-10 16:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bc0264eb3723c39fbc2339f33ca7a023 SHA-1: d8fbed8870d2c8b20b19dcbfcd63117c9accb196 SHA-256: 48dfb81d72ed4745c5045dc55c3834228d4097280388e02afa864874f67ae93e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to 'mezovuduw.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on disposable domains, a common tactic for distributing malicious content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/award?keyword=immanuel+kant+was+ist+aufkl%25C3%25A4rung+pdf PDF link annotation
    • http://siwuxedoxip.22web.org/hamilton_beach_brewstation_not_brewing.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/nhfihjh/809146681.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/Oja5Vie/bake_best_bread_improver.pdfIn PDF document text
    • https://cdn.sqhk.co/bujomuvi/gxJNUdR/xbox_gaming_headset_turtle_beach.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/bgfKOjf/veduxepakop.pdfIn PDF document text
    • https://mekebibarefuj.weebly.com/uploads/1/3/5/3/135335096/jisodutivexedar.pdfIn PDF document text
    • https://ninuxegomozul.weebly.com/uploads/1/3/1/8/131871835/xozimuvuwuweragujev.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirerom/dH4y1Nq/xokigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90b6fe9-8a0b-49a4-8231-48f0f81b6e75/70261139281.pdfIn PDF document text
    • http://jenowuzax.rf.gd/zotobusinunujiwimovifoxa.pdfIn PDF document text
    • http://nolonogatifotop.epizy.com/12182688811.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/xuzevivajekopubamek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847c2ce6-fcff-4ec2-a184-249c5191c736/80220738149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a689aabf-f0c4-446d-a79c-367ce8ea71bc/exploring_photosynthesis_and_plant_pigments_lab_carolina_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef34f468-e1c4-4b2c-a81b-2d6cc45ac783/good_writing_prompts_for_6th_graders.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_37994a2c7f9248c99d2721c848ac0cd0.pdf?index=trueIn PDF document text
    • http://fadadopotonu.epizy.com/dapagulifusefikeg.pdfIn PDF document text
    • http://limidiladafa.epizy.com/how_to_know_my_facebook_id_and_password.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_c262efcd8e674ffb9011c3925da0bad3.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_0107c5d04c7d4edcb6d492adbe1ef5da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dorulusof/oneplus_file_manager_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/befojesixisom.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_off00012d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D04 5692 bytes
SHA-256: 3bb0143a4eb7f4b4a2a9c1b0ad7a7ec5e77dafb79674c9afe89eb69bb965273c
font_01_sfnt_off00013fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCE 11392 bytes
SHA-256: b1b689e8a6f3a268b832f59eeb39837193da665627fefda82555d4f46125dc66

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