Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66212b1e5d9b8cc…

MALICIOUS

PDF

81.0 KB Created: 2021-04-06 05:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cc1b7de66083ee4513cfc63725f7d70f SHA-1: 9ab8727b48370e92466b5508eea085f683913544 SHA-256: d66212b1e5d9b8cc40fbfc003ffbfdc18f07e5af03796ae91016b09486b0bb68
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a deliberate attempt to create a link farm for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/123?utm_term=diary+entry+template+free PDF link annotation
    • http://sijemogezabusa.sportsontheweb.net/ufa_cinema_center.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/maru_bessie_head_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/OjfSiiM/oscar_de_la_renta_perfume.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/tZvsicY/lexoto.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/NhejcRi/texofelisutagoxixidudawo.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/5856731462.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/a138876fc150d7c.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/dudemu.pdfIn PDF document text
    • http://shoop-fp.ru/tstt_trinidad_locationsn4xti.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/eye_mask_template.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/XWjhkTc/22063293221.pdfIn PDF document text
    • http://vowuzemiru.medianewsonline.com/lodevetikuletoris.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/kixuzidapofeda-vimevowik-vuribarexoxibu-kupexobos.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/ligix.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/kuwobiji.pdfIn PDF document text
    • http://glasshookahcatering.com/kogopirumimuramubonofij0d.pdfIn PDF document text
    • http://like-store.site/derivatives_of_inverse_trig_functions_proofghleg.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/dafumuxitupav/85652336662.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/81229430202.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/indiramma_housing_online_application_form.pdfIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_2e63e711f6614b1195d22c042ab3cb6b.pdf?index=trueIn PDF document text
    • https://f43304fd-85e4-489a-8612-81977e01be4a.filesusr.com/ugd/b6f504_a75f564d3dc74b058fd5381210fb6ae8.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_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 4968 bytes
SHA-256: d8dbb497cec1d8975bec51880d48c6a012a16f1e8d60f7f7904f7be9a21d3ac6
font_01_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 11216 bytes
SHA-256: 6c5f10a04a1181212d177dc2a97488e47e98b845bb0e489b64983580d485746f

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