Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a3e0211b5ddaaf…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 09:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d808608d4ff1b85a36e3ba662b448dee SHA-1: 5d400352fdd44959f5e347772cd183bd30122109 SHA-256: d0a3e0211b5ddaaf50fe93235ff4623f8e8acfc16c81a44c9959171d9305baa1
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 an invoice-themed 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 0.9957

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://zajinet.ru/award?keyword=b.+pharm+colleges+in+tamilnadu+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/tajugajobib/cgioOhb/clumsy_ninja_hack_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/4hdjjvh/zotideb.pdfIn PDF document text
    • https://cdn.sqhk.co/taxuvoguraji/JhpgfnQ/fofimujujovukek.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/BuiaMjg/general_hospital_nelle_leaving.pdfIn PDF document text
    • https://cdn.sqhk.co/suwojixuwebi/hbjjha2/zogufikuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/hjhDSrX/mental_health_first_aid_training_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/DjfhgF9/cat_4_ar_cleaning_tool.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/ieiaU09/wevelujufanuvevawasageloz.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/ahj9Cja/jitokobutelebezi.pdfIn PDF document text
    • http://duvesawolaxu.22web.org/33363000289.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/gIieWgf/my_talking_tiger_game_download_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/7iceyx5/18833622530.pdfIn PDF document text
    • http://xevapol.22web.org/28340647103.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/fMicojf/letter_s_worksheets_preschool.pdfIn PDF document text
    • https://cdn.sqhk.co/goxupolofodi/N3geOza/rogivajexozadafalaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88ada13-17f6-45d5-993d-f4b208f6bb7c/26116275442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd00de4e-3521-470e-95b2-c87b89e96d8a/how_to_open_kenmore_elite_washer_door.pdfIn PDF document text
    • http://wesekiluxalema.rf.gd/what_grade_do_you_take_pre_algebra.pdfIn PDF document text
    • http://velewetuwo.rf.gd/79245983261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abb2d5f-b393-42c1-91a3-30e82bdda074/7608013234.pdfIn PDF document text
    • http://zukizibukuxupir.epizy.com/viviramoburuwenirinenodo.pdfIn PDF document text
    • http://funurebebepoti.epizy.com/offline_synonyms_dictionary_free.pdfIn PDF document text
    • http://jawafezirosozo.epizy.com/64375908058.pdfIn PDF document text
    • http://gavutubawoxin.epizy.com/paxupanupozasakibar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc9bb9e-5926-4842-ad52-a2184009059e/the_royal_ranger_book_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db621cdd-ab43-4819-a2bd-4025efb6786f/how_to_put_plantronics_voyager_headset_in_pairing_mode.pdfIn PDF document text
    • http://vukenorap.epizy.com/ca_foundation_books_2019_free.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_off000104d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 5924 bytes
SHA-256: 1f60c2205e654cad7e20e3759a9dc147c9089bbb050a2d3e43aa5a6f29d7087f
font_01_sfnt_off000118d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D9 10776 bytes
SHA-256: 330d2398569a49ea3ce6d816a5101746b527194f8e9568a30a0bf7985dd6309e

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