Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1be85dbf70bff2…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 11:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 72e670c4d2e265087e9808d2f4fcaf7b SHA-1: c79b716a99aa0915210f123d0548037d31930a14 SHA-256: 8f1be85dbf70bff22e881d468b901422f4f74e748508a9e89f26fbb12ceca218
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URIs, with one pointing to 'https://maypoin.ru/123?utm_term=aba+english+premium+apk+2019', which is likely a phishing or malware distribution URL. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a sense of urgency to prompt user action. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/123?utm_term=aba+english+premium+apk+2019 PDF link annotation
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/rurisubozegewidefex.pdfIn PDF document text
    • http://vuvujev.iblogger.org/wasivilubesoser.pdfIn PDF document text
    • https://sizadefo.weebly.com/uploads/1/3/4/3/134381744/divevetinig-kesosu-xubatokaz-pamufapax.pdfIn PDF document text
    • http://devovonabukuzim.66ghz.com/lijubujesojoxuwu.pdfIn PDF document text
    • http://tivadejasuxaso.22web.org/20263290956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimifad.epizy.com/empire_last_season_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e117d4-d205-49d0-9261-0af079313b35/53243335574.pdfIn PDF document text
    • http://kawobos.rf.gd/microsoft_project_licensing_datasheet.pdfIn PDF document text
    • http://guvamimifufirar.rf.gd/20_minute_guided_meditation_for_relaxation.pdfIn PDF document text
    • http://vulomalizekuvu.rf.gd/best_quotes_from_forty_rules_of_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836f9c37-c161-4927-aab0-df4e4b4eca65/90582238788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd32b8fb-807c-4c1d-a419-ed7421f5a76a/bisoxupagotowototawelolig.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/77584943689.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/atypical_pneumonia_guidelines.pdfIn PDF document text
    • http://koroxep.rf.gd/71676071779.pdfIn PDF document text
    • http://fejoxinivume.rf.gd/shaded_red_dachshund.pdfIn PDF document text
    • http://jigabez.epizy.com/pf_withdrawal_form_new.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 5908 bytes
SHA-256: aebb4f4ecc2e1c0ea7e7faba3d66da88610a725a9b20c4eec90527571fb1f12d
font_01_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 12020 bytes
SHA-256: 4b1d647e05d30c3cace8165601ebd38bc66405c8b5332eeac601a0196585ceac
font_02_sfnt_off000131d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D4 16148 bytes
SHA-256: 64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b

Open this report in the interactive analyzer, or submit your own file for analysis.