Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb6980a695d9678…

MALICIOUS

PDF

80.6 KB Created: 2021-04-09 10:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e57692ac7046f79240abed028b30eb5b SHA-1: 28668789b7a2d222ef053852ac2eecadf7e25fe7 SHA-256: 7bb6980a695d96780fa0cb7a8cd4f3ef59d7b6dd6b45cce28932be98ba5000d8
156 Risk Score

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 0.9990

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://crophysi.ru/strik?utm_term=which+is+2nd+language+in+canada PDF link annotation
    • http://swiss-family.space/jarilatebalufi6g8.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/lasolurinejedimeli.pdfIn PDF document text
    • http://shoop-fl.ru/6577365482335k87.pdfIn PDF document text
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/6406698.pdfIn PDF document text
    • http://comforfemj.fun/702016210355fwom.pdfIn PDF document text
    • https://xebagamalod.weebly.com/uploads/1/3/1/3/131383607/600dc636a7975.pdfIn PDF document text
    • http://medtechnika1.ru/motiwafbsxny.pdfIn PDF document text
    • http://useplafond.xyz/bronchi_definitionmu5jr.pdfIn PDF document text
    • https://rebusisi.weebly.com/uploads/1/3/4/0/134017700/aa835b72f796002.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/wofaxil/does_ch3ch3_have_a_dipole_moment.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/deus_ex_1_weapon_guide.pdfIn PDF document text
    • https://b0cee159-9ce3-47d2-9452-de9e383f1b6b.filesusr.com/ugd/fac5c7_acda8d6e83dc450682b976e17a3884b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/flyer_template_google_docs.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_8a9327eb8b104fb9b0fee43173bbc031.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/mac_os_catalina_won_t.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/how_to_tell_how_old_a_kenmore_refrigerator_is.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/pajomarojazapaxafa.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_a970976ff4b640aabd0f9b7bb9ee2b30.pdf?index=trueIn PDF document text
    • http://jowawaba.atwebpages.com/43680919568.pdfIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_0676f26e37704610a5d471d971fbd8b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/adobe_flash_player_activex_setup_free.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/poxivasu.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/fogazerewolebitiluginexi.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_396cf691c350472cba2f3898f50f8f96.pdf?index=trueIn 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_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 4940 bytes
SHA-256: c3c252d02e923538356e79fcf053810089d688149feeb2170839c1c9de0c4a8b
font_01_sfnt_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 11440 bytes
SHA-256: 75b9bc1abc9aebc09b5e7e1e2b1fbbb12a37970a334bdc6465a950e0e6dacb2f
font_02_sfnt_off0001253b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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