Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1f950d39dc4ff4…

MALICIOUS

PDF

67.6 KB Created: 2021-01-22 20:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3d6654e7d33216bc5d01a2b46dc7bfab SHA-1: a5aec5c6bb9937dca8492f6b9b220f39209881d6 SHA-256: 9a1f950d39dc4ff41efb164c77eca9a32c08a4c60b3f60d88b5d80c1f5ea71f1
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffine.ru/wb?keyword=phoenix%20fox%2010%20news%20stabbing In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5ff0ac74e0c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fe8dd739691f.pdfIn PDF document text
    • https://pujowuvorokom.weebly.com/uploads/1/3/5/3/135347933/sunawewabizuma.pdfIn PDF document text
    • https://site-1168384.mozfiles.com/files/1168384/hello_kitty_printable_coloring_sheets.pdfIn PDF document text
    • https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/ba913.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/wipufidipojulomelufevaj.pdfIn PDF document text
    • https://site-1168164.mozfiles.com/files/1168164/angry_birds_pop_2_gameplay.pdfIn PDF document text
    • https://site-1174749.mozfiles.com/files/1174749/happier_music_video_meaning.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/rugajabazomuk-wexasomovexelu-wujifuvow.pdfIn PDF document text
    • https://putofikanavo.weebly.com/uploads/1/3/0/7/130738484/ropewuvokukus.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/15f56c5d932f.pdfIn PDF document text
    • https://site-1173857.mozfiles.com/files/1173857/10622326020.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/kemebovonetowu-banexopa.pdfIn PDF document text
    • https://site-1195763.mozfiles.com/files/1195763/50226953216.pdfIn PDF document text
    • https://nazoxuja.weebly.com/uploads/1/3/2/8/132814973/valefelawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobisojew.epizy.com/word_2007_templates.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/tejowakapolusadukiw.pdfIn PDF document text
    • http://fobexegedun.epizy.com/1815599841.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_off0000cb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2B 5396 bytes
SHA-256: 3e87faff327f89234471f2d667772a59be79f31dd7be143958ef3511cbbc5fb5
font_01_sfnt_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 10576 bytes
SHA-256: ca7c4b4f842cc2303c98537f0e3a2536c5f98194d500c232980c380e4fc00c06

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