Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fc1b065c9da9f6…

MALICIOUS

PDF

73.9 KB Created: 2021-03-30 22:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cb19fcdb02c1250287fbca96f94e1148 SHA-1: 8696221e4885a9fee3ea17965cbe8c8bf1ea2b97 SHA-256: c3fc1b065c9da9f6fd7c6fe1f364dd856350575cd14dc8c397ebd8f70389c2fd
192 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a visual download button, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/award?keyword=convert+pdf+to+word+arabic+ocr In PDF document text
    • https://cdn.sqhk.co/kubepugemaki/OoxjfYm/xabiwomoperegusava.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/cursive_writing_worksheet_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_601a7595ba77f.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/cjdr4hi/renumber_switch_stack_2960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_6010ef54980d2.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/hdhbLhb/easy_recipe_for_german_chocolate_cake_frosting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448547/normal_5fef998971ee2.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimijexap/iMzibib/xejujuzedamojevos.pdfIn PDF document text
    • http://fisurigata.22web.org/98675867864.pdfIn PDF document text
    • http://bazodifufibi.22web.org/ecologista_definicion.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/dgjfsja/20654197000.pdfIn PDF document text
    • http://fevajubinijexaz.iblogger.org/mustang_owners_club_of_australia_inc_qld_branch.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://jagofebasej.epizy.com/8683966651.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/lolaj.pdfIn PDF document text
    • http://ropugefax.epizy.com/93422137109.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/download_basic_accounting_books.pdfIn PDF document text
    • http://dusuvoparujizoj.rf.gd/34440263600.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/do_the_black_masks_really_work.pdfIn PDF document text
    • http://pekamidakoj.atwebpages.com/brother_lawrence_prayer.pdfIn PDF document text
    • http://zaruxokogidut.epizy.com/wotlk_assassination_rogue_pve_guide.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_off0000d58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58B 5040 bytes
SHA-256: a576861a142a81d9af6ac3b2e4d8a7187490c0cd58569e6cd233bb521a223422
font_01_sfnt_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 11688 bytes
SHA-256: e20a1cabc2673a2cb20f3143e7e15df038d2f41c9ffdf09231fc452ee96cb6d4
font_02_sfnt_off00010c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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