Malicious PDF — malware analysis report

Static analysis result for SHA-256 333c5d2e632a2940…

MALICIOUS

PDF

74.7 KB Created: 2021-03-14 06:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d5372eac7a676aea70bd0b4053636820 SHA-1: 98c970e21faaf0e2c7bc847ffddfca7b9fd551aa SHA-256: 333c5d2e632a2940a207b35d7aabcc314d4c4a9737e5d2b3695b8911d6d8317b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external URIs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=speed+distance+time+formulas+pdf PDF link annotation
    • http://gosologesegob.iblogger.org/gamilowa.pdfIn PDF document text
    • http://vepapin.iblogger.org/29688775767.pdfIn PDF document text
    • http://chambrehq.xyz/fedemutxauin.pdfIn PDF document text
    • http://vknart.xyz/how_to_get_out_of_the_friend_zone_book46pvf.pdfIn PDF document text
    • http://amaryllis.space/jukakeburogunaxitnspv.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/tezofuretejom/32821355812.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_c9ab2a8a4b2e4b8cb3e534aaf63727bc.pdf?index=trueIn PDF document text
    • http://xidiredojowezi.epizy.com/47611206418.pdfIn PDF document text
    • http://bavabime.rf.gd/chopin_fantaisie_impromptu_sheet.pdfIn PDF document text
    • http://bizozominam.epizy.com/58933956061.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/xozuviniwifosuparemab.pdfIn PDF document text
    • http://zuvemodu.rf.gd/asamapta_bengali_movie_720p.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_b568ba96ca664551b2709560812d5135.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_bb58aca411fb49708cf4bd2376e2dd12.pdf?index=trueIn PDF document text
    • http://tugojan.rf.gd/4229625419.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_0837e062b4514cbb85be006360dd4e2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0096c84-dcce-4f43-829e-efe9d561966c/lojodov.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/71759032217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170db08e-a930-4daa-a0b5-49918d9ca04a/tcl_65_inch_tv_walmart_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3a46b7-2b31-434c-b8c4-44d0a303e1a8/18081509717.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_22273465af8c444982fd8633b426f848.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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 5404 bytes
SHA-256: 94b820c9e71f9cda1eaea9703447cf9bd38a009b8d84cef0977833c9d6589e45
font_01_sfnt_off0000f559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 11808 bytes
SHA-256: fef180ea16d4032ed999228b6c7f03a9b1e75b747629f71792d892838522bcdb

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