Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a3c01866271285…

MALICIOUS

PDF

77.4 KB Created: 2021-04-13 19:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a50fbd8e84daa441d6dfcc48ffb7141 SHA-1: ea155e0290afce4e9fb98448aae3a62088c51056 SHA-256: 76a3c01866271285328c8b7b4c4a2577cd0d9fe5cf8052f5eee7858cb33f71ef
146 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. It uses a callback-phone (TOAD) lure. 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 0.9989

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=osha+forklift+training+video+spanish PDF link annotation
    • http://titoto.xyz/bedexosurasl3lhf.pdfIn PDF document text
    • http://20970907.net/4462972584985mbi.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/cecilia_meireles_poesia_completa.pdfIn PDF document text
    • http://ogranicbio.fun/what_happened_in_the_greek_golden_agekymbh.pdfIn PDF document text
    • http://kinokaiff.space/chinese_pattern_vector_freene1f5.pdfIn PDF document text
    • http://vuvuga.xyz/how_to_change_your_mind_pollan_podcastsn25v.pdfIn PDF document text
    • http://fekowepiz.mywebcommunity.org/cooling_tower_function.pdfIn PDF document text
    • http://onlinesos.tech/sofowirikoxorawub9uzib.pdfIn PDF document text
    • http://cosmostil.top/chrome_old_version_for_android2z2y7.pdfIn PDF document text
    • http://kigetipopizatij.getenjoyment.net/java_8_stream_tutorial_youtube.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/milipidubokugimodevo.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/tf2_and_another_thing_youre_ugly.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/zunivinakuxezetuduvikubftexl.pdfIn PDF document text
    • http://tk-pobeda.site/versatile_meaning_chemistryda9m8.pdfIn PDF document text
    • http://tikopariwoxa.mygamesonline.org/figugetabepupularuxif.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
    • http://povuputuk.epizy.com/63530332136.pdfIn PDF document text
    • https://6090ae5c-070c-4b50-bfd2-11a66789f099.filesusr.com/ugd/83cce3_efcdbd42ef15470ca21395825c565df0.pdf?index=trueIn PDF document text
    • http://dusilasazeli.rf.gd/graphic_design_company_profile_sample.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/definition_of_research_methodology.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_579de09a7fb84f38af75927a4ac013a7.pdf?index=trueIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/steam_boiler_catalogue.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_9af1b5e82d044875acc02906c78fc04d.pdf?index=trueIn PDF document text
    • http://migumirokive.epizy.com/12239063673.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/xikejebefadaboligugu.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_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 5240 bytes
SHA-256: b0d06042fd27a8375c2b938336cf67ca8e3135f4b321e94193e0d8412502219e
font_01_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 11736 bytes
SHA-256: 3529eac1c89dc93e551e08ee6fcdc6649cdf06f1f15cca95ebf3503bcadbf89c
font_02_sfnt_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71