Malicious PDF — malware analysis report

Static analysis result for SHA-256 79716e05c854b4b5…

MALICIOUS

PDF

78.7 KB Created: 2021-04-01 23:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5131acd14959b7ac10ba187277fe6f8c SHA-1: d2d390669bae0fe3314d1f8cad6df2f1860dbd34 SHA-256: 79716e05c854b4b55c1150ce880e3c053625f30e57f87e527b11f6c5e2807a20
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, specifically targeting users through deceptive content like resume templates. Although no scripts were explicitly extracted, the presence of many external URIs suggests the document's primary function is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/123?utm_term=case+manager+resume+template PDF link annotation
    • http://tiruxukanemaga.iblogger.org/gakufabekesub.pdfIn PDF document text
    • http://lekanevakima.iblogger.org/how_to_calculate_thermal_efficiency_of_an_engine.pdfIn PDF document text
    • http://vidclips.design/hardies_cement_sheet_sizesh9veh.pdfIn PDF document text
    • https://kowexemi.weebly.com/uploads/1/3/1/8/131872048/bulotazidusa.pdfIn PDF document text
    • https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/ridufonip.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/condense_file_size_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_601888633c8d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403820/normal_6008b75a84c3f.pdfIn PDF document text
    • http://tells.fun/passion_translation_bible_free_downloadslmeo.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://wigelasipop.rf.gd/ruwenumegisozef.pdfIn PDF document text
    • http://juwebud.epizy.com/vehicle_registration_information_kerala.pdfIn PDF document text
    • http://pibekolovaxizon.epizy.com/subtracting_decimals_worksheet_grade_5.pdfIn PDF document text
    • http://zividovapajawuv.epizy.com/sobesizi.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/69637753190.pdfIn PDF document text
    • http://wupewujivijulo.epizy.com/gejugi.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_off0000ea91.bin
deba1087bbf1ac8d116b99bc2fecbc44a74b71745d00d27f97104e5ca28beead		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 4888 bytes
font_01_sfnt_off0000fb11.bin
6dd6fcac631533b7084ba3f770949c40ba4ed2e0cc7c7003f6eb750d538a68f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB11 10880 bytes
font_02_sfnt_off00012019.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 4324 bytes

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