Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffa026550e03158…

MALICIOUS

PDF

82.8 KB Created: 2021-04-12 23:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2351f88e0b91fff6ac4e2f55b26125f4 SHA-1: b0574a3403de8d455452cbdd7105c8d83a0e61d0 SHA-256: cffa026550e0315887de57ef09175113ca506b620e7cf0dd64c1dbe8532e92d6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9996

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=how+do+i+add+apps+to+panasonic+smart+tv PDF link annotation
    • http://manovina.mypressonline.com/gemujojaloda.pdfIn PDF document text
    • https://dezuximoloxesar.weebly.com/uploads/1/3/1/4/131410685/vunisokib-zasezezile-tijapimeb.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/surah_yasin_arabic_text.pdfIn PDF document text
    • http://rasprodavaika.ru/mammography_reporting_formatmhh8v.pdfIn PDF document text
    • https://vomodubezu.weebly.com/uploads/1/3/5/3/135398809/xewuli-sobotogipok-gulabefekamopug.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/71f8a0b9cf43f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_6057a50d1fd15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_6010c838ec286.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/how_long_can_you_nap_in_contacts.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/breville_breville_compact_smart_oven_toaster_ovendhal4.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/fundamentals_of_cost_accounting_3rd_edition_solutions_manual.pdfIn PDF document text
    • https://devaropig.weebly.com/uploads/1/3/4/6/134616199/xorowo.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/fea03.pdfIn PDF document text
    • http://yildirimotobursa.com/tapanirt13w.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://uploads.strikinglycdn.com/files/f8aff6e8-ebce-42ac-94c1-97d3dee6ed79/33314880032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65340d83-e70a-458e-a75c-caa045ec3eef/wujikofegemelixeduxez.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/what_is_another_word_for_first_of_all.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf051c94-666f-45b1-8046-a70f225368ab/why_wont_my_turtle_beach_headset_mic_work_xbox_one.pdfIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_cded2adbdb3844a6a00cbdd002e6cf03.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_844fe29e2068414e805ba1ac610bc6b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7468d829-70b2-4192-adc8-cd2abeadd88d/majum.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_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 4972 bytes
SHA-256: ba90beeaecb5c23745a0ad2f327f3ab28c8139d905f698d13bf3aaf066f6a249
font_01_sfnt_off000108e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 11308 bytes
SHA-256: 8d54de12f7f5546d8d6cdd18bb02855c66e6bc73d74a6ac868d08846b81cf687
font_02_sfnt_off00012f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F11 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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