Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe723fbd3bbe9e9…

MALICIOUS

PDF

76.8 KB Created: 2020-11-23 05:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b9e1801e5cc8e256281b4e25c323e353 SHA-1: 68321e6dbb45989370cd6654fd0431bb7824120b SHA-256: ffe723fbd3bbe9e9f7ea77f592362f5775e2b5f60258204354363fb348208266
252 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The presence of a 'download button' lure and numerous embedded links, some pointing to disposable hosting, strongly suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/wb?keyword=candy%20crush%20unlimited%20boosters%20mod%20apk In PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/getisebeb-tilezifuv-sidozani-bipajad.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/finuvavubabu_jiwigo_buwun_watik.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/dakuz-kotududijapabik-wonogixe.pdfIn PDF document text
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/bcaffa018c5.pdfIn PDF document text
    • https://faxulifil.weebly.com/uploads/1/3/4/7/134731484/1790296.pdfIn PDF document text
    • https://deguverafutaw.weebly.com/uploads/1/3/4/5/134501054/1100446.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/vexosafugunu/the_shade_of_elura_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/bauer_hockey_stick_flex_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d693706-afb9-4262-8a44-e55c3cb5fcb1/asp_net_free_ebooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d48c8ed-417c-4dff-9f3b-7f6d58d1acc6/65374807590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc01fa4-cab5-487e-83c4-5cef6c5ca4a0/shadowrun_dark_terrors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cee13f5-e162-44a1-b4f2-59c50a8ed096/17705486005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e313c4a-f6bf-495c-b78f-5dd2f83df05c/51461461983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b75f771-69ce-4505-ae9d-d29415be369f/36543182238.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_off0000d7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D2 5524 bytes
SHA-256: d77779738fbe231de85d69be99f49d667d4cc3bc998f5201c564008354f5a604
font_01_sfnt_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 11104 bytes
SHA-256: 2b41684fc389c701f4a0b691c8f259812660423969202a5eb705f9d51a93a98a
font_02_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 16320 bytes
SHA-256: 0a71093478b4d45b4d76e64f0f6643daf86e51ddb6e6cf70e5a519f96dfb1fe3