Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a3b03e770ffc14…

MALICIOUS

PDF

104.9 KB Created: 2021-03-24 18:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a2465302356260b1dabbce81e9cad582 SHA-1: 60295d5074024174ef752fe66d765f93bc57b099 SHA-256: d2a3b03e770ffc149f4a7dd2e061c49fc1d8c93d386e6d6d709f3339d5d49514
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous external links suggests an attempt to direct users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://xajibur.ru/aws?utm_term=boy+scout+camping+merit+badge+conservation+project PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453144/normal_5fdb832466951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_604d94f8a97b4.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/cTggjsw/lefulimun.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/P8jgjed/94343677644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480898/normal_602d73fe88dca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5ff49749b0ab6.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/dgjkjjq/84705235203.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/ggCxxhh/love_photo_keypad_lock_screen_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_600775bc4f068.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/hchj5ic/glow_hockey_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/jbicdja/color_touch_effect_in_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/cLZPifx/jeluneseposisi.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/temujonuwu/39676867069.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_044c5be2dff64bafb1a1adaceacbfa40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fodose/black_peep_toe_platform_heels_bootie.pdfIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_3af9d09f9ec14455866c9aff48671ee7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejifavo/china_cymbal_sound_free.pdfIn PDF document text
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_a5fa0db10a5340d683d3ff2a0a79bacf.pdf?index=trueIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_b44c074ed9fd4815974272883ba77aad.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_404bdb0713ac498597f99b846cd37903.pdf?index=trueIn PDF document text
    • https://e2685184-9bcc-4d63-b126-5f7cf6655de3.filesusr.com/ugd/267f13_745c39d7e7f84cfa8c95a92ee5fbe316.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/tenufuvunowizazo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/3332321319.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_e67cb4b2f11d470fbe822ae00d9de5aa.pdf?index=trueIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_23382a5af639445ebae35fe74aee4e65.pdf?index=trueIn 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_off00015755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15755 5788 bytes
SHA-256: 887a3b3a0cba1e903c8e7792f7894bab9eb01571d5a7fa2b0483b10e51965810
font_01_sfnt_off00016b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B06 12184 bytes
SHA-256: 5c93463e77e1490d7ebe66cde752ca49e9f2b09d12fe340c7055a216ac133eda