Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae40243c7e3cc1d0…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 00:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2c85c65cf27d8eb32df83aacccd7c51e SHA-1: 9c4a88ad95b3fe79e76973a6a88c8353e5ca194e SHA-256: ae40243c7e3cc1d066c583cc443294b1bb1db6f22353d656c7abebcfcc083f39
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/wix?keyword=letter+of+recommendation+from+church+pastor PDF link annotation
    • http://about-igsupport.com/fishing_report_kingston_seqhm0x.pdfIn PDF document text
    • http://semengergel.ru/viwagofixukuvalarosae2.pdfIn PDF document text
    • http://blockhcain.host/jurowalimolos9xuo2.pdfIn PDF document text
    • http://euromarket.pro/42698663819xgwoq.pdfIn PDF document text
    • http://portkamesto.site/is_2003_jeep_liberty_a_good_carruncx.pdfIn PDF document text
    • http://fitness1.space/47218649660596lg.pdfIn PDF document text
    • http://sluzhba1.net/lego_75038_instructions946nd.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/5f5c0b33-821e-4855-843d-aa7711501ecb/free_dollhouse_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b686ab29-fdb8-4207-9d76-a9a21bc7c51c/mojotovimozexokajujuki.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/guide_chain_tensioner_manufacturer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b222f8-3ea5-48a4-9e21-9c16a1d67b1a/how_to_write_a_faith_statement_for_confirmation.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/69266391228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c6d0c4-2b19-401c-b6ed-48f5d2d4166d/jonijawojusa.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/dominions_5_marignon_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796e3166-5b36-4cbc-b6ee-9fe8093b725d/sekenezenurudoraja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac357862-fa25-4aac-a1ba-e5c77a217d65/xanisekive.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/moxoxivizonedos.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/is_functional_training_good_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec87fb0-caad-4bd8-b4cb-d434c6c04d69/ar_15_stock_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a390126-d61e-43a5-8b46-0d1b997d4746/big_fish_grill_rehoboth_takeout.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/harlow_solid_let_font_free.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_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5188 bytes
SHA-256: 758090afa4a9394101628489069da9043887b3c12ccaec7119cd6ccaaae74bfe
font_01_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 10592 bytes
SHA-256: 47c15a2315584d078608e4f9788471400c00fb5078569b2868ddfa904115bba3
font_02_sfnt_off000126bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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