Malicious PDF — malware analysis report

Static analysis result for SHA-256 7159e649de6e3aaf…

MALICIOUS

PDF

54.2 KB Created: 2020-11-05 17:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7a7815ac589bc940493f654ac5d8cb96 SHA-1: eb4eb18c85897e544925482c645c1f8f3ded20bd SHA-256: 7159e649de6e3aaf33a52fa84851008d75b551af640252e55e58ed63412dad6a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains heuristics indicating it is a lure for payment redirection and browser extension installation, specifically mentioning a 'network changed error google chrome' in its body. It embeds numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier strongly flagged this PDF as malicious, supporting the social engineering lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://trafficel.ru/strik?keyword=network+changed+error+google+chrome PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f8ce84a5dbf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8708d6460b7.pdfIn PDF document text
    • https://zozelezike.weebly.com/uploads/1/3/4/4/134434207/kapulefize_fawigej_jifujogozeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f9579f498031.pdfIn PDF document text
    • https://bezowaki.weebly.com/uploads/1/3/4/6/134611163/xavopifaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451949/normal_5fa0d11002b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f9ed2a073909.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/cac79602-cc7a-493d-b4fb-9c5fe7460b57/kikusajojibujin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3cf17e-4d65-49de-98e1-437d559dd848/download_free_svg_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0397/5098/files/62328364371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81911762-9279-472f-9641-26182b257b31/leaf_bladed_spear_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934f7253-6a3d-461d-aa5e-96487d9c2a19/xefinubole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b9d1f8-f70b-4199-b997-8acdb9fcd0bb/lebanidisafelipivogiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b15082-0832-4c3f-8cf7-1e960577fc5d/chromebook_shortcuts_copy_and_paste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72ee7e5-8a52-456f-a072-8f61d54b2c1e/elsword_freyja_pve_guide.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_off000088e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E4 5040 bytes
SHA-256: be71e240d2db0b786bf8789e61fa049ffb8fc71a839fc8d9826872334c51bea1
font_01_sfnt_off000099ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99EE 10424 bytes
SHA-256: a0e2b25ba64c0e983f474971cc5f551fde60ebb21281928befbddffa6e8b3c47
font_02_sfnt_off0000bd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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