Malicious PDF — malware analysis report

Static analysis result for SHA-256 463224a3504e0717…

MALICIOUS

PDF

73.3 KB Created: 2021-02-25 20:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: eed4f903a01e75c45aac410e39721d8f SHA-1: 6920ae13383b691b3bad9a76fd7f827238734826 SHA-256: 463224a3504e07176d8e39450ec292561453a43c4ef8f63f2439fbe240dba5d8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of external URIs and the overall structure suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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
  • 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://jacksth.ru/strik?utm_term=casio+2747+aw-80 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444123/normal_6015a5ccdded7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5fe3e598ece82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460071/normal_6002be7ee654c.pdfIn PDF document text
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/bawanuzimasufonox.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/bhe94hj/49217413886.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/hhidehc/letudejufek.pdfIn PDF document text
    • https://vifiboreb.weebly.com/uploads/1/3/5/3/135349596/362825c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_5fe978302b113.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/36if4hf/strawberry_cake_recipe_from_scratch_no_jello.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fd696c185682.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/oster_belgian_waffle_maker_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466659/normal_5fe4346c0fc84.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/xhgDhcr/inferno_lobby_login.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/dugolet.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/under_the_dome_season_3_episode_4.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/zafijukopa/annie_khalid_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/passkey_enrolled_agent_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/cheri_cheri_lady_english_song.pdfIn PDF document text
    • http://zuputes.atwebpages.com/last_child_in_the_woods_ap_lang.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/bahubali_2_telugu_movie_ing_com.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_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 4820 bytes
SHA-256: 7a6523e170a347cba6ae756583c2e59f34d645a069bf82dbe6be9508967c9a7d
font_01_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 10684 bytes
SHA-256: 386f2d2556b1c7ab93dea6562196b680075f1cde5a3ed97f0e07ad8683920c5b
font_02_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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