Malicious PDF — malware analysis report

Static analysis result for SHA-256 56af0845075cd365…

MALICIOUS

PDF

73.2 KB Created: 2021-01-18 23:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2115afa0cbae27bc6a6bdba337f49f48 SHA-1: 71986154e355bebd80a5798b1c8858cd5664a9ba SHA-256: 56af0845075cd36525219a20ee82757fa6030a84ac748db57674b15088522a0e
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded links likely lead to phishing sites or malware downloaders, and the document body is heavily obfuscated, preventing further analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=c%2526s+car+company+in+waterloo+iowa In PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5fc924249c6d3.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/iia0iaB/vlc_android_chromecast_no_subtitles.pdfIn PDF document text
    • https://kepegefamoza.weebly.com/uploads/1/3/1/3/131398453/laradudukegef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f8df81ac34f5.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/cjgpkCw/bikon.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/zuxojolul.pdfIn PDF document text
    • https://kifewuwumezoduk.weebly.com/uploads/1/3/4/7/134740170/risena.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/jifmjh7/90715803102.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420013/normal_5fe0684c5921c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5ff8477d7bd55.pdfIn PDF document text
    • https://fimuvuxufubewi.weebly.com/uploads/1/3/4/4/134442536/fatelebuput-dilikos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455886/normal_5fcaada26fc79.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
    • https://s3.amazonaws.com/dogazisuze/banting_red_list_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/piano_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/gozodobenaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/bumuvada.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/movies_free_hd_bollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/superannuation_withdrawal_form_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/89410857883.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/30320161683.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_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 3508 bytes
SHA-256: 2774017ff7eb3cebc0e4722e6402203a1a451f45227012c45ddafe5c002425d4
font_01_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 10580 bytes
SHA-256: 06a0f92f55aabe4118e0711ca5ca18e9e7f4fe0bb33b027f6c116d6bb7d74b84
font_02_sfnt_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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