Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb8259860a987a4…

MALICIOUS

PDF

75.7 KB Created: 2021-03-09 12:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e1690e72c134b83269aa80d0a1bc7ec SHA-1: 96d19dd4c6f6158295f124651dc318cc76e941ee SHA-256: abb8259860a987a433328660ff24daccb9305d43c2a2828c9bb0f191a22c8bca
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, https://botokaw.ru/aws?utm_term=walgreens+wrist+blood+pressure+monitor+symbols, appears to be the main lure, while other links likely serve to obscure the malicious intent or distribute further content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=walgreens+wrist+blood+pressure+monitor+symbols
    • https://cdn.sqhk.co/nujudemugipi/ijEiegc/performing_arts_high_schools_in_georgia.pdf
    • https://cdn.sqhk.co/gasawivu/1aeaXhg/gif_to_video_converter_high_quality.pdf
    • http://istra-backwater.ru/agilent_multimeter_34401a_priceh9qsw.pdf
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/fujilikunasaj.pdf
    • http://umniashka.ru/google_sheets_index_matchyqfwc.pdf
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/karuwes-xeniwako-sadoxilulimarek.pdf
    • https://cdn.sqhk.co/dijexovesaf/jbMicd5/street_racing_channel_mckenna.pdf
    • https://cdn.sqhk.co/luwivimexu/ZINdpAS/tizulunexefupep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/turip/80232327693.pdf
    • https://s3.amazonaws.com/xisakazelelinim/bigo_live_hack_diamond_apk_free.pdf
    • https://s3.amazonaws.com/setikizo/vuwogolakisovafeva.pdf
    • https://uploads.strikinglycdn.com/files/29df34a1-7692-43f4-889c-48a155ccd17d/best_enzyme_cleaner_for_dog_urine_uk.pdf
    • https://s3.amazonaws.com/bovenotojitowe/change_hotmail_email_password_on_android.pdf
    • https://s3.amazonaws.com/susonanezaj/33289504936.pdf
    • https://s3.amazonaws.com/pidufozu/67847057277.pdf
    • https://uploads.strikinglycdn.com/files/1c6b341b-6320-43da-b149-1ae589c6a171/74898168693.pdf
    • https://s3.amazonaws.com/fomaralunex/fijibogugukexenen.pdf
    • https://s3.amazonaws.com/kavifunaruvi/83016622935.pdf
    • https://s3.amazonaws.com/vofadoloves/trail_cameras_that_send_pictures_to_your_phone_verizon.pdf
    • https://s3.amazonaws.com/gapivegek/soldier_13_performance_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e983.bin
c18014f626ca96746d4fd72b4d90cd6b8a8eeddb7beb4333cdc0a804a1afd07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 5624 bytes
font_01_sfnt_off0000fcac.bin
a6bb1a6ef860556c8f7c365bc413ad2cc065316b501c5ddfaeec378460810d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 10816 bytes

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