Malicious PDF — malware analysis report

Static analysis result for SHA-256 caeb45277f381b75…

MALICIOUS

PDF

77.5 KB Created: 2021-02-19 05:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 81ad0a8133c305656a1cd45fe576609f SHA-1: 976a606beea23c2140a899a5be5eef5b32aae1ab SHA-256: caeb45277f381b75c1d54cf1c7448fc3619ffb45845e9681c0bbe0e674624b01
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains or using link farms, indicating a likely SEO manipulation or phishing scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a malicious document designed 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://jottigo.ru/wix?keyword=compound+subjects+and+predicates+worksheet+answers PDF link annotation
    • https://pevumufaropis.weebly.com/uploads/1/3/4/7/134706438/gefirofepoma.pdfIn PDF document text
    • http://sibuvre.com/toilet_paper_blaster_instructionsqoyrt.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/7563253.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/icONDhf/rawubinozazaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_602d092b9b1f5.pdfIn PDF document text
    • http://praktika-ingenieur.com/50348203743cds3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403960/normal_5ff9e155dab98.pdfIn PDF document text
    • https://sugokumorol.weebly.com/uploads/1/3/1/4/131437576/b0ede50396664d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5ff63747659d8.pdfIn PDF document text
    • http://vknart.xyz/douglasville_police_department_accident_reportscyus3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368982/normal_5feb6a0ae03cb.pdfIn PDF document text
    • http://interplast.ru/first_aid_kit_contents_list_for_schoolqy48a.pdfIn PDF document text
    • http://slmit.space/jalupemurofezoxogarejenun.pdfIn PDF document text
    • https://palejuzuz.weebly.com/uploads/1/3/5/9/135959315/risapinumipi.pdfIn PDF document text
    • https://mixowobigasobu.weebly.com/uploads/1/3/1/1/131164278/midif.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/8ac70349.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
    • 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_off0000e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 5556 bytes
SHA-256: 070924793e733ac2dff4ca9b9c52267d2b8e388316829bcfb5b351fa2097f180
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 10376 bytes
SHA-256: 54cde06340abff0893e1154df1050b1c8b0af2289cc471616cf6bc8a3d75fbad
font_02_sfnt_off000119da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.