Malicious PDF — malware analysis report

Static analysis result for SHA-256 061b2557a8a7f0ce…

MALICIOUS

PDF

75.5 KB Created: 2021-03-03 03:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3c59e787e53513032bb1c71b4853e398 SHA-1: f58fc7f3ecfd9cc0298f850d7174d744198af1a0 SHA-256: 061b2557a8a7f0ce0dc7aa6e516bcee78cb9b3e8f6d61e821deecd0e8aaf4ba8
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 urgency-based 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 0.9998

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://fokemale.ru/strik?utm_term=best+liftmaster+garage+door+opener+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459777/normal_6002aa28548db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453100/normal_5ff7cce232942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_602807c2e30c6.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/Q90yhcJ/bein_sports_live_tv_app_for_android.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/gugopakovewuwarenibevowa.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/mKigjj3/blocky_car_racer_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/ihKv4iF/arknights_weedy_age.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/words_that_start_with_n_to_describe_someone_nice.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/what_are_the_rules_of_conduct_for_members_of_congress.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_601655461ef1d.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/bufiw.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/2nd_grade_books_to_buy.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
    • https://s3.amazonaws.com/regegozumekoza/archero_apk_money_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/19783292733.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/rowavuwisivid.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/baixar_livro_alta_fidelidade.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/bath_sheets_walmart_canada.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_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 5472 bytes
SHA-256: c6f2f0ef2ad8f0412fd940735ae349d5845fc93320b15e52792dd3f5a29c68ac
font_01_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 10552 bytes
SHA-256: 02e962b0371f726e7295f7cb4093a42d84abe531b9446254414316f6be15578e
font_02_sfnt_off00011299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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