Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7ac10f4c87f96a…

MALICIOUS

PDF

104.7 KB Created: 2021-03-14 03:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c7b66586fe7c20bcc5fcbe4a46d70587 SHA-1: dd11e7b4dc3d7da15b7f1034879099fec9ddb725 SHA-256: fb7ac10f4c87f96a18933b87f315b13ada14462a144c6cdca6e1da4c8d038146
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/123?utm_term=rogers+channel+guide+oshawa PDF link annotation
    • http://tujijamutibe.sportsontheweb.net/math_workbook_for_5th_grade.pdfIn PDF document text
    • http://banobukosaze.22web.org/jim_collins_great_by_choice_triangle.pdfIn PDF document text
    • http://leledup.mypressonline.com/the_highwaymen_movie_trailer.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/xerafumubufebeken.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/fe_review_manual_3rd_edition_free_download.pdfIn PDF document text
    • http://brumbum6.xyz/vovalogevofijizomujujerobt8bu.pdfIn PDF document text
    • https://sumewawuvivifos.weebly.com/uploads/1/3/1/3/131380344/9877911.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/37498072600.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/venulom.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/42626767630.pdfIn PDF document text
    • http://porn77.design/aqa_gcse_physics_equation_sheet_p1_higher27lu4.pdfIn PDF document text
    • http://profmaster74.ru/scansnap_s1300i_driver_for_catalinafgrae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokifirozizal.epizy.com/asus_crosshair_iv_formula_bios_chip.pdfIn PDF document text
    • http://nozulabagewena.epizy.com/jitterbug_phone_for_seniors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06011f08-66eb-4aac-8ffe-fd9d5ddb3e76/wedifabez.pdfIn PDF document text
    • http://xoxejafomi.rf.gd/94262973944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6393b679-4666-4946-a174-f6ec2f005feb/sears_12_belt_drive_band_saw-sander_manual.pdfIn PDF document text
    • http://pixagikaw.epizy.com/market_cap_on_balance_sheet.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/vokivexiliravemuvaxovata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1359729a-8a1a-44d7-9856-beacb830a8ca/is_the_diono_radian_rxt_safe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE3 5300 bytes
SHA-256: 5abf7822040eebdc129cae7c94420d9aadbd589076c26ff5c65344a0f5683461
font_01_sfnt_off00016dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DFF 12044 bytes
SHA-256: 9dce1824a95c6244d1c0314ae98c32997c55c61d2127024a8843cebab34327bf

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