Malicious PDF — malware analysis report

Static analysis result for SHA-256 3154d0e2dce96af0…

MALICIOUS

PDF

70.5 KB Created: 2020-12-07 03:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1f28d214224099d55595b54b1e276306 SHA-1: df25c5f62a920384b1dc18d0166d7b72f823b7bb SHA-256: 3154d0e2dce96af0f1cd75ab3f7bbd7de1ab4200b987244d8f9bc406ea2578f9
156 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. 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 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=14+cows+for+america PDF link annotation
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/7296995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aceca2f1-b800-44e5-9d14-fab7f8440019/96379769864.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/tabela_brasileiro_serie_b_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf70014-792b-40e1-a6c1-a604178b66da/pozanujevatituwidazitiba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc232cf09257bd6bd446/t/5fcaf68f9708706f3992758b/1607136912553/2020_ford_mustang_super_snake_horsepower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c708f96d-784b-410f-b55c-365ca5ab1c75/the_great_tao_stephen_chang.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29eebabaecd33182d3b3b/t/5fc3af6061e25426e1a85120/1606659938241/eos_fitness_palm_desert_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cefcee-3322-4c16-a250-7ac693d019e1/how_to_make_a_redstone_torch_turn_off_with_a_lever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894147fd-ad15-40ba-a292-20449f82b4ad/jibozoguzokizomoka.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/xurasifixubirowu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d9d28787e879896bb85a/t/5fc3dd32173fb5383b1a17fc/1606671668621/negowunavapijotizu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e1c227a199023ac2594c/t/5fcd3a7783d2ac65cc1ef26d/1607285368233/tevubipexijidekijutuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eed2e91-d5e1-4988-80e1-9afa5716c33c/marrying_mr_winterborne.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/45911372286.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 5132 bytes
SHA-256: c99893c8154a962cad9c8c417d5381ff0b32a11f7957e2405f0e31f64296dcf3
font_01_sfnt_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 10696 bytes
SHA-256: 985017864c875426ed00e55a9fd9d08717b73b787d76441b747cc985b6d853a3

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