Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b45ee961103c56…

MALICIOUS

PDF

97.9 KB Created: 2021-03-10 11:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 37e8ae207f18ace2b4e8ed29d0b8864e SHA-1: a4dbac3e704dd2e7f540aaa0b01401398eced0d1 SHA-256: 33b45ee961103c560d4fdbb4c307a7a10a0aff24d03384a8d06b57edc7f23a16
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of embedded URLs and the 'Cibil report creditmantri' lure in the document body further support a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/123?utm_term=cibil+report+creditmantri PDF link annotation
    • http://dabukim.mygamesonline.org/bubajomunujezifibelu.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/82224194036.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/40640755573.pdfIn PDF document text
    • http://sidanixom.22web.org/adenocarcinoma_mucinoso_de_pancreas.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/d554fa53-6af3-4192-b089-5908ff611630/jexepojowave.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/sharp_aquos_blinking_power_and_opc_lights.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_6c0d1fb1728844d7aa36d108c0b19083.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e92cf0e-bba9-4267-83a5-ec7546f627b8/biwir.pdfIn PDF document text
    • http://ropugefax.epizy.com/9900649017.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_86cc26a14e92413a93eaad6c444dca90.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1c558e-4245-4a29-8463-283360f97dde/delta_4_in_1_crib_white_babies_r_us.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/stihl_bg_56_best_price.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/dd_5e_vampire_pc_race.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2962bde9-fc73-4b73-833e-a70d16e62e20/tomobirabamowatilonatepa.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/what_type_of_expense_is_freight_considered.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f82f5a-36b1-488f-9b7d-23dc871c5495/lamborghini_gallardo_lp570-4_price.pdfIn PDF document text
    • http://pesivosemero.epizy.com/nakadudukivuzojesat.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_490ad2bd74b54551ad6b1d5fe831d735.pdf?index=trueIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_9b50776240954bf2a27377f9bf26afa0.pdf?index=trueIn PDF document text
    • http://wudemexa.myartsonline.com/ge_phones_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af438a5b-a85c-4415-b3d9-75f974dd579f/systemverilog_assertions_handbook_4th_edition.pdfIn PDF document text
    • http://suzufesa.epizy.com/best_songs_2019_list.pdfIn PDF document text
    • http://fategag.rf.gd/kerala_quiz_questions_and_answers_in_english.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_off000144ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BA 5084 bytes
SHA-256: b9f2cd6b152d9201480598d49cf672fe628b0ded5c55e29db9aa9a982abf6da1
font_01_sfnt_off000155d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D8 10680 bytes
SHA-256: 7f55779ed681c3c390095018e0fe712f8008bf3b0b369a89bdee66f695749328