Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2689c613a09194…

MALICIOUS

PDF

72.9 KB Created: 2021-06-12 22:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b6be01295b67ddfd744703352192b801 SHA-1: e58ae5b2fe62760bb166071cc16048de813fbedc SHA-256: bb2689c613a09194a301fe0d5b577415175f0399844153d176e48d2bd220ddfa
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://pixomot.ru/pbw?utm_term=all+english+verbs+pdf PDF link annotation
    • https://fejuzewe.weebly.com/uploads/1/3/4/8/134883228/d200eb05c050c7.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/4334991.pdfIn PDF document text
    • https://kaneloko.weebly.com/uploads/1/3/1/4/131408798/rozedu.pdfIn PDF document text
    • https://boxuxalido.weebly.com/uploads/1/3/0/8/130814411/6475592.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/ab45b107-2127-434d-b454-1869492dc6e7/whats_the_realfeel_temperature_outside_right_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11475b3f-67db-4b00-bc43-6aa5bc389fb5/16092410804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ed8d01-bcc8-4323-aeef-62573a288009/how_to_become_licensed_electrician_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882811a7-92ac-4054-a5ac-3102e4e40f66/hp_deskjet_1512_scan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5b75b0-4e43-4a43-90b6-3d238f6050a8/71865928194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a14156-40fb-48f0-b1fa-8bea767aca83/ziledemirumedifuxojubadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9a0be1-6cd7-460c-87c8-f9cf4540bb93/64928687311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c48f388-f90a-4a45-80ae-4b679ddc073b/puzosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31937de-a826-461f-8a6e-357a6b6a7161/how_to_measure_and_draw_a_floor_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68457709-73f6-4534-a4ac-57787c4ff1cc/zowilivutowik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384c1f0d-89ee-4b1f-938b-f5de6114c805/mimetugedubobikil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4015b1f-1f94-4cab-ae76-bbe1bff99725/lotomoxuvevoruwozavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da88678-d7b5-4f8a-99d3-76672c443a2e/pdi_plano_de_desenvolvimento_individual_preenchido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3103324c-37ff-442a-8c82-6e9f61cc4f1b/92598296326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5edf328-dbb1-4a22-a229-e558f163f733/what_does_silk_do_to_your_hair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5dffaa-7b3a-4825-bd4c-90c9b7e998c5/67426894059.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_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 5284 bytes
SHA-256: e84b4a981385a64fb140b16e5f80627091994b47b71da7cf403508fff38b4964
font_01_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 11164 bytes
SHA-256: bc947b260f9b0914770120400771ced81dc2853f523ccce246a93dd29659578c

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