Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e9ca6332eef81e…

MALICIOUS

PDF

78.6 KB Created: 2021-04-02 05:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 35695d78d012e544c831b1609044986f SHA-1: 9f1e22b5fbda13c79a4840abc54f520fcc5f31b2 SHA-256: 46e9ca6332eef81ea7e0e2cb329d5d6a03abefa3c71d2bad905242c5d6ba35a0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/123?utm_term=walkie+talkie+apple+watch+not+ing PDF link annotation
    • https://cdn.sqhk.co/sesakiwewe/b5he1ia/20279929288.pdfIn PDF document text
    • http://hotita.space/selenium_python_tutorial_youtube69ht6.pdfIn PDF document text
    • http://static-start.top/bivudigitorigd.pdfIn PDF document text
    • https://pirebuvix.weebly.com/uploads/1/3/2/7/132710697/6930312.pdfIn PDF document text
    • http://leopards.space/nepurafephbqyc.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/star_wars_knights_of_the_old_republic_pc_download_free_full_game.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/58995137552.pdfIn PDF document text
    • https://cdn.sqhk.co/volinafi/hahbW9S/raspberry_pi_2_i2s_pinout.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/4385415329.pdfIn PDF document text
    • https://xesolisozewil.weebly.com/uploads/1/3/1/3/131379689/luvalasenanibemese.pdfIn PDF document text
    • http://teenagetutor.net/29347834337uy5ej.pdfIn PDF document text
    • https://soridafufunet.weebly.com/uploads/1/3/5/3/135308698/juzax.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/vijafavusaxunogis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9230f5ae-6730-47be-97b2-803b0801530d/sokipobabanodokotara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bbe3aa-ef3a-4960-ba87-187937bb528a/guwam.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_2d761428acd947319a8bc608d062cb8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6ab98b-39e7-427d-ac80-cf2bc4d2c3cf/ged_math_tutor_online.pdfIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_af7ebf28362445179fbcf8c135686ab9.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_f71ef276ddab4964bf40684d353b99e0.pdf?index=trueIn PDF document text
    • http://xobibaga.myartsonline.com/by_the_waters_of_babylon_part_2_analyzing_theme_quiz_quizlet.pdfIn PDF document text
    • https://cd8fad78-6a19-43c6-878c-830d169ee42d.filesusr.com/ugd/ff0d91_04642f77ec7641e79aba2e732a360f38.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_e3a941045c634c68953036051db842a4.pdf?index=trueIn 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_off0000f4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 5092 bytes
SHA-256: 28c804853beab4c8ee0e0134030ffd8aa4b24efecc0c44f9551f17b397f30f52
font_01_sfnt_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 10828 bytes
SHA-256: 1d77f7e878fce3fd8dcf7f1b13d1527ed265a38c6b744bcb128d86a8af260de5