Malicious PDF — malware analysis report

Static analysis result for SHA-256 229fb0a451e8aa6c…

MALICIOUS

PDF

88.2 KB Created: 2021-03-28 15:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 48e79e4136d7668eb221bdbadc9e3748 SHA-1: 279d9323b8c4a6367d8e7c106c5ec932e607bda3 SHA-256: 229fb0a451e8aa6c3fbd5536a53e09b88332e139ad68a11bbf06231c1cc9ba40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URLs, 'https://golowaki.ru/strik?utm_term=how+much+does+sweat+bbg+cost+kayla', is flagged as unknown reputation, suggesting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://golowaki.ru/strik?utm_term=how+much+does+sweat+bbg+cost+kayla PDF link annotation
    • https://cdn.sqhk.co/zegofurop/jj1ijjS/focused_insight_installation_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/cChd4hf/wudojuvalenajefoxedo.pdfIn PDF document text
    • http://zoomita.space/sogibebediperimawidijpd7ni.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/iiieXoT/tip_split_bills.pdfIn PDF document text
    • http://afracheat6.xyz/nutimuferirenugikapdpj83.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/dibbOjc/12084375607.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/70a1f531-aa0c-42a7-a0bc-5c8d0b9a70b2/how_to_use_a_midea_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/30750450853.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/78765960253.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_36a54502420c46dabc0fdb603b5ecc54.pdf?index=trueIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_e7fe3195e23245ef8eb9a72864418616.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salade/calendar_2019_with_islamic_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e4c943-fddf-43ee-8777-2e598366f740/be_happy_and_enjoy_your_life_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/92789992499.pdfIn PDF document text
    • https://b1fb0efc-5f10-4bea-ad4d-af18431eea87.filesusr.com/ugd/84a5c6_35381665a53f459584d88804154a4779.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizaxo/how_to_reset_service_reminder_on_john_deere_d130.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/5_love_languages_test_free_online_gary_chapman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9300d073-5a98-4723-a50b-08d02402a9fd/47399517557.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/sexelawazowugofiminubobib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad02fff8-1a98-46f2-84b8-906711f3cf50/salario_minimo_para_empleados_exentos_puerto_rico.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_98b0286295314653b7b27e62d712f18d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/14996538860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44502714-2ff0-46c9-ae67-d884c60aa85c/98640755719.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_off00010c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 5616 bytes
SHA-256: be2d145a927e0d3562ffdf29e10d78e61ba8819d028d8ec0f620accc07d9ae55
font_01_sfnt_off00011f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 5012 bytes
SHA-256: d8516b967b6be069a2f17b596fd094a86b8dac13c0ce90cebf75e389cbe0895a
font_02_sfnt_off00012d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D49 10904 bytes
SHA-256: 2ab6e29486a120072771d64bd8c54531bfdd3bbbe65fe934b9a46fb5008aeb3d

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