Malicious PDF — malware analysis report

Static analysis result for SHA-256 225186f17527fac1…

MALICIOUS

PDF

72.2 KB Created: 2021-02-15 06:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a1280786b9147b53c52f9c8d4da607c SHA-1: 5a16ec00c6879b1ac8a15372355e88847b07b7d3 SHA-256: 225186f17527fac13016e524fe8d8cec4c46cff06dca509899d6ae84f4cf61b2
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=scappoose+school+district+school+supply+list PDF link annotation
    • http://snapchat-alert.com/facebook_lite_apkmonk_downloadxrge2.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/dojhsic/modern_sofa_design_wooden.pdfIn PDF document text
    • https://cdn.sqhk.co/deguxikezu/e7hbjhh/download_aplikasi_subway_princess_runner_mod_apk_rexdl.pdfIn PDF document text
    • http://fbdirect.site/oraciones_compuestas_ejercicios_resutuqqs.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/bgjgijg/gunspell_2_match_3_puzzle_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/fabadipub/7mF0wcv/soxaxomefamapowogazedeson.pdfIn PDF document text
    • http://ig-objectionform.com/761573226559jcca.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/hbgiI3V/73949503614.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/agfIH5H/msr_pocket_rocket_camp_stove.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/gPigiiC/how_to_say_the_birthday_party_in_spanish.pdfIn PDF document text
    • http://avlto.best/aircraft_conformance_engineering_servicesb10dm.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/c6c9282418bb.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/52hkVhd/57582586144.pdfIn PDF document text
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/tumumizejitibivom.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/tPjhShe/68821700265.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/4222587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukerakowevomu.epizy.com/ponux.pdfIn PDF document text
    • http://suzekusopowe.epizy.com/javusoko.pdfIn PDF document text
    • http://bopufadepop.epizy.com/sharafat_ali_khan_new_songs_2018.pdfIn PDF document text
    • http://nonepajurela.rf.gd/minix_android_box_remote_app.pdfIn PDF document text
    • http://jobifizokugo.rf.gd/vefabozivovobifipitedun.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_off0000dc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 5364 bytes
SHA-256: 6e0e5752b12a70c0de23d90bb7973efdb29f74fdbf8a91f02e411a5d25214d8a
font_01_sfnt_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 10644 bytes
SHA-256: 3e8668e7b14ac0c6d0fc25f28745087d91fd5f33a5b2dbc82dfd27184b59d9c0

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