Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b5f0a4a83355b4…

MALICIOUS

PDF

78.8 KB Created: 2021-04-27 07:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3361afe42b9e0029e50cf3bb98af6062 SHA-1: 94adc1b4e8ae5be77ead73510077c8a9429f13b9 SHA-256: f0b5f0a4a83355b415cb8562f34fa956eb538599db65a25d50569e7469ee0299
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a large number of links on disposable hosting designed to appear as a legitimate resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=shortest+hair+clipper+guard PDF link annotation
    • http://oficialshoes.site/jojajiwigufejajiwuftoyk.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/5Tqjgtu/devezo.pdfIn PDF document text
    • http://malespw.xyz/42482214971t74xt.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/pekejavufonanu.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/hhBO1hh/tunagokexuxadel.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/gfhfDcj/51448722371.pdfIn PDF document text
    • http://physcoo.com/fekajajajorazgqy1a.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/kotuginipaxoxubowadiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/jgwhfhi/zewenuneje.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/kepojoguzaxo.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://bawesokiri.epizy.com/antonio_cafiero.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/xajevoxivolet.pdfIn PDF document text
    • http://zesodowiponuse.epizy.com/xebunedazorusutibeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec37d8a-4853-4eff-9d65-b3bdf680cc9b/how_to_upload_a_to_wix_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d858201-88e0-4b47-8476-3fd52ef0131d/which_one_is_the_longest_harry_potter_book.pdfIn PDF document text
    • http://rojolegov.epizy.com/reflux_still_plans.pdfIn PDF document text
    • http://moborudazijom.epizy.com/pan_card_online_format.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/free_will_brewing_perkasie.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/gelabewabozewenomoposawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4762cdd6-1b60-4d0d-8c89-cb93b65c24b3/troy_bilt_gas_edger_wont_start.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_off0000e82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82B 5212 bytes
SHA-256: 40a8dadeca85ae8763df8473238809e372a782f2941c3961366ff3c40d3cfb21
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 10592 bytes
SHA-256: 561eeb90ef581493ca4420e8d35f97e78387a7fa98aa61e93758bdf30571450d
font_02_sfnt_off00011dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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