Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a6087a09091f96…

MALICIOUS

PDF

81.6 KB Created: 2021-03-24 03:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50abe71d47bb859172fa5c37d60e1064 SHA-1: 9d315b4d58a0c94676ba52f791899abac9176c33 SHA-256: 01a6087a09091f967bd402b54ddb3eef3d9dcdd06c8a330cba3dd02240295bbe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/award?keyword=cavalier+poetry+pdf PDF link annotation
    • https://tewijudejasivi.weebly.com/uploads/1/3/2/6/132682467/raramape_nivigutexoguxup.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/dK3ZWvA/spongebob_game_frenzy_apkpure.pdfIn PDF document text
    • https://losulojer.weebly.com/uploads/1/3/0/7/130739206/1559838.pdfIn PDF document text
    • https://gevuloluwalew.weebly.com/uploads/1/3/1/1/131163761/tudinarizeved.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/q1QqEge/auto_clicker_chrome_unblocked.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/menobobiwazu.pdfIn PDF document text
    • https://tebeneka.weebly.com/uploads/1/3/0/8/130874559/kizetagulija.pdfIn PDF document text
    • https://fitarerak.weebly.com/uploads/1/3/5/3/135313257/rudofiwowa.pdfIn PDF document text
    • https://sojenakituvewo.weebly.com/uploads/1/3/3/9/133986345/nizizuporefukid.pdfIn PDF document text
    • https://xagogijan.weebly.com/uploads/1/3/4/7/134720006/vuzep.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/potofaw/itunes_installer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/futabunilalosupo.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/accounting_information_system_and_internal_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4612ca-5f31-48ac-a36e-fcbb66545c75/97700853899.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/autocad_2010_crack_only_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aea7586-a78b-4a77-9fc0-76a864923d2e/julius_caesar_act_3_scene_2_modern_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/how_to_draw_a_dog_step_by_step_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/jajuzive.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/pozodomarerozemenoforid.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/sakuroxovogupigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c122ba-c0fc-4558-b45e-a651b68c8c55/mozilla_firefox_47_portable.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_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 4924 bytes
SHA-256: 529680e328a9278caa0a16992e83e0b5c88d804d4be951a81d26f63a53f469fb
font_01_sfnt_off000111e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 11116 bytes
SHA-256: b27533ae891bda3d70a7f718b7a101cc4b2880f6ed735e53fb1ba4a3400b7f51

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