Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ebd99d5c6e2c27…

MALICIOUS

PDF

85.8 KB Created: 2021-03-03 23:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4671b1c2402ff886e1f7319792e4fe08 SHA-1: efcdda20eaefdd34ab06caf9b758c7a9c0ffe535 SHA-256: e1ebd99d5c6e2c27116b95486d4decb4962b54dff2dd8b3d0898b9823eb8016d
186 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 0.9995

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://soxebez.ru/aws?utm_term=level+3+combatives+army PDF link annotation
    • https://nagiliju.weebly.com/uploads/1/3/1/4/131412426/kekolu-fotafilo.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/bxFvHb1/siwefukoziferetewiwiganir.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/Hgjgdgh/45154364511.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/ifhddhc/profile_pic_caption_bangla_funny.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/xuris-kipulur-lofigezugaxowe.pdfIn PDF document text
    • https://sofifego.weebly.com/uploads/1/3/4/8/134899758/7159892.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/eUjf9In/pc_games_to_play_with_your_girlfriend.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/bavapurumep.pdfIn PDF document text
    • http://filemarker.store/42274386582tvlq9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427544/normal_5fe99331db02b.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/0OgeeHq/zefal.pdfIn PDF document text
    • https://cdn.sqhk.co/wukikanas/cksadgh/small_business_loans_covid_19_ny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445555/normal_60001756b573e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413368/normal_5fc731e77a653.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/gf0Hpja/buwis.pdfIn PDF document text
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/fevawepesol.pdfIn PDF document text
    • https://zofenegug.weebly.com/uploads/1/3/1/6/131636866/mefadederun.pdfIn PDF document text
    • https://jalidinetuvumun.weebly.com/uploads/1/3/5/3/135333814/jovujibi.pdfIn PDF document text
    • http://myyshooop227.site/9743224562075rkb.pdfIn PDF document text
    • http://mstmail.space/37031834195e28ie.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/ihiiwSZ/vawekobofenuvusavipuk.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/KifIJsS/free_clip_art_valentine_heart_images.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129D 5352 bytes
SHA-256: d6a6a8e6ddb4f5b7478dc971a1cbfd46ccc8662aa73f624105e9ec3e68d21f3d
font_01_sfnt_off000124ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CA 10832 bytes
SHA-256: 4a6f32607d59cbdcccf00009494df534e2808d6972ac8f7b91ba5e806f8ff59e

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