Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03c068b65c0aa1d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-30 01:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc110440b76891ea8d8dcc2d47804171 SHA-1: 93b00b663cd1b1fdf5ac42c581df09270049b373 SHA-256: e03c068b65c0aa1d0d3b7626c35d12d6878d09f4435ae457962928a37f6c6d76
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm or SEO spam operation. The heuristic 'SE_ENABLE_LURE' indicates the document likely contains instructions to enable macros or editing, a common tactic for malware droppers. No scripts were extracted, but the presence of numerous external links and the lure suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://crophysi.ru/123?utm_term=cd+label+maker+template PDF link annotation
    • https://bizawipogimiwa.weebly.com/uploads/1/3/4/3/134316434/kefugemejiduze.pdfIn PDF document text
    • https://sofupikibir.weebly.com/uploads/1/3/5/3/135302021/finobosuximi.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/Lyjfiec/jefoxugabugolelugezuj.pdfIn PDF document text
    • https://tezubowaxax.weebly.com/uploads/1/3/4/6/134640868/pikawoxevu.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/hj8hjhj/idle_human_app_female.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/jhiajjC/wizened_in_a_sentence_adjective.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/anatomy_and_physiology_of_urinary_tract.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/rZhjjgp/painting_ideas_easy_on_paper.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/navewumubu.pdfIn PDF document text
    • https://cdn.sqhk.co/wanuvudeb/idhiPRq/goxokowabutagujif.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/bundeswehr_dienstgrade_heer.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/c9d64ff.pdfIn PDF document text
    • https://fogebutozedelig.weebly.com/uploads/1/3/0/7/130776223/kokunuzimivej_rubal_podunopu_jikekidejamuti.pdfIn PDF document text
    • https://rumuzejisu.weebly.com/uploads/1/3/5/3/135349165/a1d48145.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/f40c41f542.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/warujusur_gibibopamobel.pdfIn PDF document text
    • https://fuxakitedev.weebly.com/uploads/1/3/5/4/135400966/dedb9f9a93edca1.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/woxotopapozokev/specific_gravity_of_hydraulic_oil_32.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef77a4c7-6b49-4e39-b581-a7f53951568e/46258649636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be1443f-06a2-4dfd-a379-a27941b3d2b4/55960000351.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/net_framework_4._03019_windows_7.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/acreditao_canadense.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b138e415-6db0-4b88-bd08-203371f3bed4/qlikview_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d30f46-344d-49d2-bc87-85c5ae2bf711/realidades_1_workbook_page_97_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49f97ab-aa04-496a-989c-fd93606e46a8/a_history_of_western_philosophy_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/volapapevizap.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5036 bytes
SHA-256: a6171676508c1bc6780a127c396eac12f7abff2aee0c56f02b0a676ddfa7dcd3
font_01_sfnt_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 11684 bytes
SHA-256: ad11688d207216902eac7a1745754a3f9c7a6317ccb1b33ba3b06155814d2804

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