Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd17fe1d2d7b717…

MALICIOUS

PDF

71.4 KB Created: 2021-01-21 14:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: de2967e0c852934e85ff98b8d73d2547 SHA-1: 3f97dc35ee0409e6c96cee5bfac7f4afb5cb2e1d SHA-256: fbd17fe1d2d7b7173f2619e084ceda7830b0388236c1a1fdcd6366d6291736a5
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector and a large number of external PDF links, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded links point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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://gettraff.ru/aws?utm_term=amway+diamond+celebration+music In PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/pezil-tipemubasu.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/cchhhcO/2976365980.pdfIn PDF document text
    • https://figidurilope.weebly.com/uploads/1/3/1/4/131452961/4803997.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/l9H87ha/the_war_of_independence_1857_mcqs_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/nisosawero/S1jdYii/video_maker_app_free_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/noxobabidof/wibVJhb/download_20th_century_alternate_history_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/eiiggG4/arcade_classic_games_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/hjhdiab/perfect_world_mobile_apk_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/bHCjhxB/16169052050.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/fAgeqZI/buwosejavot.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ihcegdw/xukevesarigomirafo.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/3de568e4c6.pdfIn PDF document text
    • https://cdn.sqhk.co/xizubutagen/bEFicii/airplane_movie_autopilot_for_sale.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/kiwopusafize/puzavibe.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/zirunepodatud.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/61006518222.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/sifejojumodusib.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/kiplinger_retirement_report_renewal.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/zufuvatuzetedezemir.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/indian_flag_png.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AD 5408 bytes
SHA-256: 5cdbce03b88ac7deceaeda2e7e1a58c8730946761086af1ca53c5fa37b340435
font_01_sfnt_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 11692 bytes
SHA-256: 87447ecd231147b59f399d9f30f1d4d8bb1fc98d98dbcfd66f78f9d52efdf7ca

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