Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c81bcda4a8c0e4b…

MALICIOUS

PDF

87.6 KB Created: 2021-03-14 04:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 738c931c2931a4a2243d71887f60be1f SHA-1: 89af67225028c9c0d87bf07f1467bf6354f28743 SHA-256: 6c81bcda4a8c0e4bf4e31725252948d1e1b71d37b98ed0f23e60ce7703cc522b
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-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.
  • 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://dugedepap.ru/wix?keyword=ultimate+spiderman+total+mayhem+apk+pure PDF link annotation
    • http://nurokojo.mypressonline.com/ritetemp_programmable_8022c.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/rising_of_the_shield_hero_light_novel_volume_14.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/acls_2020_espaol.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/97348830235.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/canada_protection_plan_application.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/steamer_basket_how_to_use18ptz.pdfIn PDF document text
    • http://lianhua.life/62842143585bpxo4.pdfIn PDF document text
    • http://braco.ru/guess_men_s_cologne_seductivev3ep1.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/72573945161.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/mejobu/tyvek_flexwrap_submittal_sheet.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_291bf6bdcc154bc5b120c985f52b9a9c.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_a40bb88d4c6043f7896522f1a5b706c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b629e1f-baac-44e3-9314-0a0c5eef04b3/jagamoboxureduwatanotix.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/what_is_art_of_conversation_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c76351-092c-4647-b40f-03f27977b4b0/wutojotavisosakevigetelul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a2c7a3-8bf5-4657-99fa-c9edaebc3108/24172118551.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/95164965580.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/12420729090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8820f27-eb4a-4c3e-8d8b-b3ee2affe53c/how_many_red_queen_cards_are_in_a_deck_of_cards.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 5236 bytes
SHA-256: 3adead14fd573b3b510b02c82ef961d75a289af7ee3047016754c8ae15d66956
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 11272 bytes
SHA-256: 3ab1de1a67b6212718ee4aa3accdb1b26820388a296bec7baae504f2b946ca1f
font_02_sfnt_off00012959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12959 17188 bytes
SHA-256: 712fd870a772e96dccf4626a49273ab3298845ec0b6529230675e8604ae08117
font_03_sfnt_off00014084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14084 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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