Malicious PDF — malware analysis report

Static analysis result for SHA-256 87656be02bf0f91d…

MALICIOUS

PDF

67.7 KB Created: 2021-06-12 05:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1cce475ad54daf2300b98f022e8e3f25 SHA-1: 902c0695a5fbae3d49fb35109d87c29412f693e1 SHA-256: 87656be02bf0f91d80ecbb8645ec8e468595d3b254513f29dbca5a0f897aba91
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/pbw?utm_term=tom+and+jerry+full+episodes+download+mp4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485457/normal_605c8ce17a255.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4387219/normal_60b53adbe8142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_600aa9e198d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_60b7d5ef50924.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/miwetofi-lujolipodika-ratovunufika-moxafilefajuno.pdfIn PDF document text
    • https://wilufonikeku.weebly.com/uploads/1/3/4/8/134878677/e68d03e71.pdfIn PDF document text
    • https://zexamedoguko.weebly.com/uploads/1/3/1/4/131454027/cc51bf10c143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_6062151264fd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144451569/23854889254.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/w/file/fetch/144438585/charter.net_email_settings_thunderbird.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/75558739464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6d331c-4b35-4d06-a7c9-8aa62f17f5cc/90249708864.pdfIn PDF document text
    • http://tugewuvog.pbworks.com/w/file/fetch/144734091/how_to_use_ghost_white_toner.pdfIn PDF document text
    • http://funesut.pbworks.com/f/28839796622.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/f/zapar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbd7268-bc9a-4e6e-90a6-612518d5f694/moen_single_lever_kitchen_faucet_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e08ed28-c300-4123-829c-9a15ad7a3496/legafutomewanenetiwomamum.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/f/how_to_insert_enteral_feeding_tube.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/98530225919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f16c4ff-1e44-48d9-a008-0bc411b661c6/11092621947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e599d7-4854-45ee-830d-f9c06e0e9499/book_review_rubric_4th_grade.pdfIn PDF document text
    • http://tewabavuxate.pbworks.com/w/file/fetch/145161735/babul_ki_duae_leti_ja_song.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_off0000ce01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 5496 bytes
SHA-256: 399049b8424bada6f32a2a3cc8a738b0f818a179ccb259852a0db3fed4aadcb7
font_01_sfnt_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 9612 bytes
SHA-256: f100f0dc421175dce58eada5c786eb43ad114f928af7afef835f2812d6edb35a

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