Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd63d0c36b4d427b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-23 14:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 626b650795fc4a59f53521e0f80c77b5 SHA-1: ab722f87b8f6c54fb5f2cda41fd88ea57838031e SHA-256: dd63d0c36b4d427bc05d28447ffd9e89e70d88a42951a9badda4b04ef39b3f36
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, presenting a lure related to a 'free download' to encourage users to click through to external sites. The numerous external links, many hosted on disposable domains, suggest a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=kayla+itsines+bikini+body+guide+free+download PDF link annotation
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/bopofid_tumuxemafos.pdfIn PDF document text
    • https://dutumujupag.weebly.com/uploads/1/3/1/3/131383630/jazap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_604dbcc63931e.pdfIn PDF document text
    • https://zetozegazironik.weebly.com/uploads/1/3/2/6/132696155/xudujefuva.pdfIn PDF document text
    • https://semototip.weebly.com/uploads/1/3/5/3/135386148/6977849.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/fajup.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/f2cb2b9c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fdfdcc0a40fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386073/normal_5ff221956a706.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/wNv98hj/jubibinipoxafokojodurixi.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/ihi5gi8/kadekixuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_601b180cc8cd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fukezavazuj/funofusijumano.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/natevevesixidovovedo.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/sea_of_thieves_error_windows_10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 5324 bytes
SHA-256: 48a13fd895a8d5ccb196a2f61c218a9901cef82264b5cf6133a05cda84fbb013
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 10828 bytes
SHA-256: bfa8d11c21f93c0205638cf3b94c1391e8a8f797537842004c9f80e9b11a1cfa
font_02_sfnt_off000116d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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