Malicious PDF — malware analysis report

Static analysis result for SHA-256 912ea50cffd84aeb…

MALICIOUS

PDF

101.7 KB Created: 2021-03-16 07:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3277543898379a9494c92483917f03d2 SHA-1: bf82716678d2ecd491bc8ab67050ffa3970c1374 SHA-256: 912ea50cffd84aeb092b37c035eca582531d514fe44389ec32f59452a3c945f5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, with one prominent URL being https://botokaw.ru/123?utm_term=apasl+2017+guidelines. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests it is designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=apasl+2017+guidelines PDF link annotation
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/cc40f80b9f64.pdfIn PDF document text
    • http://goodsun.fun/594477949083el5f.pdfIn PDF document text
    • http://bighome.space/how_much_do_investigators_get_paid2z28s.pdfIn PDF document text
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/zuziwexitajuvapev.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/5070182.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/c06a88394f.pdfIn PDF document text
    • http://idealslimitaly-official.site/texas_principles_of_real_estate_1_bookxq4pa.pdfIn PDF document text
    • http://rebelliona.online/komomupurixalopenuf4ycnt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/dell_latitude_e6530_core_i7_3720qm.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_b052801999a84763ba2e5e8b37613e9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6a8af1-9dec-40c1-bb5d-a195ee0d555d/kobudolor.pdfIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_60ca2ec6c5be4dcda1614772587db508.pdf?index=trueIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_f7e9cdb7f2f6413492c15d001ffce63d.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_e7c2592e69a0458db11b80e518124c07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupojakami/celtic_mythology.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_a74e47fa47434be388df6c2c3e40c225.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/635c0386-9814-4ef3-9d46-3343877b595b/shure_ulxd_sm58.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/fugezizupapizifujiwegoloz.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_bc93e5962bfd4d87a894b52d38791760.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e31d85a-9339-42fc-853f-a0b103e6a58a/molija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba43e5f9-0f24-46da-89c7-59f447ecb658/twilight_2008_full_movie_hd_download_in_hindi.pdfIn PDF document text
    • https://b760d8db-9746-4821-aa2b-94c9f806d328.filesusr.com/ugd/26ce45_1b1bf7f7c3d24e5bb9ee763f5cdffd3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/peace_like_a_river_lyrics_hillsong.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_off00014cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB5 5428 bytes
SHA-256: ab6d13605ba84f92eeda6d6d779a84e60f7f26a85a7d8ae9e6d568b1762ff9c7
font_01_sfnt_off00015f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4A 12972 bytes
SHA-256: 5d2b9a351c25a644558583dac5f0f2008055506c8f9ef8e4f0f31e503a3d77a6

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