Malicious PDF — malware analysis report

Static analysis result for SHA-256 be409057ac631217…

MALICIOUS

PDF

83.9 KB Created: 2021-03-01 21:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c209c31fee0698a4f0bb87f5b3f64abd SHA-1: 35ba6eee4e967ed25e7996c0aff9c12506d24be0 SHA-256: be409057ac63121768b94514d28ee99dedbe575461046d2621d8c23f0c0f77d7
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting a phishing or scam attempt.

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://ponafet.ru/123?utm_term=what+is+the+best+milwaukee+battery PDF link annotation
    • https://cdn.sqhk.co/numiwufeguv/gZ6iahj/switchblade_knife_for_sale_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/hdhgDHn/3317370704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_600f31ee98088.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/nike_air_force_1_pixels_gg_summit_white_dark_beetroot.pdfIn PDF document text
    • http://pornbustyvids.com/xejedipibatixozobuzol4a13n.pdfIn PDF document text
    • http://fullcreditreport.info/emergency_medicine_fellowships_reddittqusa.pdfIn PDF document text
    • http://stopro.store/12534938802jenci.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/heQ3ihG/kikura.pdfIn PDF document text
    • https://kakoxisowi.weebly.com/uploads/1/3/4/3/134358665/795399.pdfIn PDF document text
    • https://xetiwokew.weebly.com/uploads/1/3/4/7/134741649/19f1e947.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/hec_hms_vs_hec_ras.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/basiwopimozegezodi.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/njebkT6/82519316776.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/jgGigjb/38805232877.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/48377530464.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasigajixivete.epizy.com/vejikanukotorusirufo.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/93581254589.pdfIn PDF document text
    • http://fapugemuxo.epizy.com/editing_background_hd_app_free.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/convert_tex_to_command_line.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 5336 bytes
SHA-256: 0ad70388fee6f003f75a284edecec0a4c127d8549f2c52760f27341185d25ada
font_01_sfnt_off00010531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10531 11464 bytes
SHA-256: c14ef67608f3087cebdc09005c2f3d0a855bc029f942df0034ce9d86de41e622
font_02_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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