Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf9ebb686e64262…

MALICIOUS

PDF

89.5 KB Created: 2021-03-19 08:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6ace91ae5b3a7e7c477051376b7de72e SHA-1: 9eae431e0f212858785143fa776c0d39bcc46d8d SHA-256: cdf9ebb686e642626a50d86251b80a076f5c96e019050698e1c16d173847a239
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, while appearing as search results, is a lure to direct users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=omega+xl+reviews+reddit PDF link annotation
    • http://qrastenmap.online/what_is_the_movement_of_energy_through_substances_in_longitudinal_waves8uv1b.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/2jgihdQ/47352192136.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/jhiOa0I/cujo_the_coding_robot_toy.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/eMifijs/3503573170.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/HmwajhT/xekerikesi.pdfIn PDF document text
    • http://rubisteq.online/goodwill_clothing_donation_bins_near_meegd80.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/jiKyPQC/nukuzenirajazel.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/dhbifEk/63535313956.pdfIn PDF document text
    • https://cdn.sqhk.co/gikasiful/d3vmhbI/bootstrap_templates_form.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/2Ggegc2/jubidubivato.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/awUhiRc/main_asteroid_belt_in_our_solar_system.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/boRWHWx/rikowi.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/bhbz3D9/intelligent_hub_android.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/hdhiXp1/space_warp_gif.pdfIn PDF document text
    • http://urro-hu.com/how_to_hook_up_honeywell_thermostatqhlh7.pdfIn PDF document text
    • http://robinmani.site/petonuyi24b.pdfIn PDF document text
    • http://homeolimp.com/hp_photosmart_7760_photo_printer_driver_downloadurm6o.pdfIn PDF document text
    • http://vorgazme.com/59634608180ive32.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/discomfort_is_the_price_of_admission_to_a_meaningful_life_quote7h76j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_58b5681bde6440868ffd28b0d06029f2.pdf?index=trueIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_0a44a464a9d546839e5ddd0e4fe0d641.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_22f179ea382c45f7809e5a49545b5c74.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_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 5392 bytes
SHA-256: 75c5dfb8d47ee4fa85ce58612fd2cc92841062ed7fb58fd05a9e388cf17d0a3a
font_01_sfnt_off0001308c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308C 11888 bytes
SHA-256: 1c3085ed78b4bea877a688315e481ec53870a30ce632765f35d9ff3e92496d55

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