Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6692ff5d25d2ee…

MALICIOUS

PDF

77.3 KB Created: 2021-04-12 20:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 42fc8ef50f2ac43bff16d2921ea7aab0 SHA-1: e89df65f1d4ba437429abee066fa63e4971fd0b4 SHA-256: 3d6692ff5d25d2ee8424d0d5efd917cf9c772b7927176f1103fe2ec64d8bdfc1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured as SEO spam, pointing to a primary malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL `https://gimoguvi.ru/strik?utm_term=how+to+drag+sort+in+pivot+table` is the most suspicious IOC, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/strik?utm_term=how+to+drag+sort+in+pivot+table PDF link annotation
    • http://kifisafobubupo.mygamesonline.org/86672735617.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/vedexajawo/91664244385.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/fiwokoxetuvafafadilowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a3fd98-f246-4a7f-a4d1-81aef8157102/fender_frontman_212r_footswitch_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/keburunejegumezajiva.pdfIn PDF document text
    • http://tameladizikep.atwebpages.com/genetic_basis_of_sickle_cell_anemia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26aa9fae-87e6-41f5-92d5-a9e1b9e30963/lejuropizuwoxuloxawakij.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/pimegajadin.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/elementary_statistical_methods_in_psychology_and_education.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/american_heart_association_infant_cpr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e96d05-728e-4642-9292-ee86c622b328/kirby_heritage_2_legend_vacuum_bags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a289b4d-0de6-4980-92f9-0f5eb3b269f2/how_to_calculate_step_down_transformer_kva.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/13573520643.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/hi_diddle_dee_dee_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8409e833-57f7-45f7-8c4a-bfb6dc1621f9/50530974029.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/gotolapi.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/22992256392.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_f09087cedca142c3a804dbd1061ddffe.pdf?index=trueIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_2adcea3b43e54fa79f26725ff5c429eb.pdf?index=trueIn PDF document text
    • http://lekeviwa.onlinewebshop.net/35669247992.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_d647d5ad511f4310af144a82c7871df7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povodijirig/93580341529.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_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 5168 bytes
SHA-256: e2affdae01fa1064bcaf344c0892119a3e6b3e3fbec8f45df6b63d1c19f94903
font_01_sfnt_off0000f724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF724 10100 bytes
SHA-256: 4d79b573827ffe5d7a8efb36ec96a0d489e207da4cfb47e29a3d18d70efb74ee
font_02_sfnt_off000119b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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