Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefe9f9642635fae…

MALICIOUS

PDF

78.3 KB Created: 2021-04-01 07:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b00ab5af0aa64b16eb0d8b181fe36771 SHA-1: 4973455b3c72d5a28b7b32f89a4d9d939c090045 SHA-256: aefe9f9642635fae82ae15a32346695c7e6b45888c88e21fa59568f98324020d
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one that mimics a search result for 'terminal emulator apkpure', suggesting a phishing or malware distribution lure. The PDF's structure and the presence of many external links indicate it functions as a link farm to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pelibifir.ru/wix?keyword=terminal+emulator+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388422/normal_604353a9879dc.pdfIn PDF document text
    • https://gadipofonikiw.weebly.com/uploads/1/3/4/3/134390141/zonetiroroxogeni.pdfIn PDF document text
    • http://ketotreno.buzz/fadeguxabevutumopipfabq.pdfIn PDF document text
    • http://kyponnik.online/31318396066k7zcw.pdfIn PDF document text
    • http://hr-insider.com/hitachi_led_tv_reviews_indiaxnmvf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_600f1283da205.pdfIn PDF document text
    • http://hellesypakk.online/citytopia_mod_apk_obbrnak4.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/kefojit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_6058cce7ddca4.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/69538362945.pdfIn PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/vepesol.pdfIn PDF document text
    • https://vuveresob.weebly.com/uploads/1/3/4/5/134589217/wujotareb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_60189f7ec7a26.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/1789873.pdfIn PDF document text
    • http://segwaywheelchair.ru/formula_one_racing_game_for_pc9c4yc.pdfIn PDF document text
    • http://torixobo.mypressonline.com/cazadores_de_microbios_resumen_por_capitulos.pdfIn PDF document text
    • https://kesamitowusiniw.weebly.com/uploads/1/3/4/4/134441112/942691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_60591cd26b2da.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/pevarijidasalop/mokoliretite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9d34a7-add5-4388-a8c6-fa1b8a53ee05/nawupozogidovuzaru.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/how_to_have_hobbies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab225737-a4fd-4fb6-9b40-dc0021264bb4/fingerpicking_guitar_players.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/cfpb_hmda_platform_github.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/skyrim_keeps_crashing_on_startup.pdfIn PDF document text
    • http://susabumo.atwebpages.com/jitukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/how_to_deliver_a_cats_kittens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2e07a4-d3bd-4f26-b64d-a3921845bcc3/holy_quran_software_for_pc_free_download.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_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 4800 bytes
SHA-256: b9bbda8c84687c67cdc32a1d861e32aa73a7682d5173ca3b6a7a148be78ad09e
font_01_sfnt_off00010495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 11756 bytes
SHA-256: 559ea3a1ec29283acef832dff259abce07ebe871579d1c3bac20d2deeca44719