Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5edd059733909c…

MALICIOUS

PDF

79.5 KB Created: 2021-03-03 02:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 566866261be5a6e9fabd782e55157e0d SHA-1: 5e96de3fae67c7ff6954069592ac2bbf0ba369c8 SHA-256: 7a5edd059733909c481c65b451fda1457a454dd9e11bce4f7da8cbaf37a19395
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or domains associated with malware distribution, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, likely intended to trick users into clicking on the malicious links.

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://jottigo.ru/award?keyword=fundamentals+of+the+faith+lesson+2+answer+key PDF link annotation
    • http://rapoxarawiwalo.sportsontheweb.net/do_pua_claims_get_600.pdfIn PDF document text
    • http://krokoboko6.xyz/amoxicillin_mechanism_of_action2u2ai.pdfIn PDF document text
    • http://13millions.store/creative_writing_curriculum_guide_depedsc2fq.pdfIn PDF document text
    • http://koreanluxe.com/girunukijudipakok0ytp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418197/normal_6001f878bd06f.pdfIn PDF document text
    • http://fresh-ita.fun/23646236432bmozd.pdfIn PDF document text
    • http://shoop-fl.ru/ldpe_bags_manufacturing_project_report2lbv3.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/cyberpunk_2077_third_person_mod_ps4.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/mixeteli.pdfIn PDF document text
    • http://dietnatur.fun/579602474226ekaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigapenegig.atwebpages.com/tuwotufupudomogafav.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/identifying_similar_and_dissimilar_fractions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/duvegumonikilelebozududer.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/judakelunulugimovesumin.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/pippi_longstocking_tv_series_cartoon.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_off0000f87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87E 5492 bytes
SHA-256: 3482a34f99d593485edf5facb4fea3291b32fabe108edad52c51d7e857a210a9
font_01_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 10688 bytes
SHA-256: a1d59c76f0f5f08b6661fcd66f45fc5b66b1cead8b3e58371dadd42e9638f8b7

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