Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3d62c1d3231caf…

MALICIOUS

PDF

78.2 KB Created: 2021-01-13 05:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 25b167d0dd706a1730a9b0602104532e SHA-1: e941c71d9d25c020820139cabae00a7c6cda9b96 SHA-256: df3d62c1d3231cafc5f81b661cb752fab33375914ef138620ffafbff9e02ec71
194 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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
  • 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://traffset.ru/123?utm_term=summertime+saga+apk+mod+cookie+jar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489237/normal_5ff0e102bd7a4.pdfIn PDF document text
    • https://lenonexijinex.weebly.com/uploads/1/3/4/6/134647177/1127870.pdfIn PDF document text
    • https://site-1239330.mozfiles.com/files/1239330/53308006253.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/pcTYdge/watch_three_kingdoms_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/KGHEibd/60976110542.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/2ij8ylz/swot_analysis_in_healthcare_ppt.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/502c510a37c.pdfIn PDF document text
    • https://site-1195484.mozfiles.com/files/1195484/magical_dress_up_cute_monster_avatar_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/a7InigV/human_fall_flat_factory_switch.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/vopike.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/rubidokezive/overtime_request_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/photoshop_background_images.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/bricks_breaking_game_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/minecraft_skins_editors_newgrounds.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_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 5604 bytes
SHA-256: 1a12081491fb49452333dc9d7b62716b24b8b465044c48249ccce61f11936a93
font_01_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 10788 bytes
SHA-256: 1671b8d50540e85b353296ef3044484c979bc6def7384888a9db544074013a08

Open this report in the interactive analyzer, or submit your own file for analysis.