Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdffc32b1e3e3ec…

MALICIOUS

PDF

75.7 KB Created: 2021-03-14 02:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8a4d3d658cc0186b1e9ab9a58477dc0 SHA-1: 916eacfb7b621d2e2ecdaeb7d1ddb27a52909e08 SHA-256: 0bdffc32b1e3e3ec871b16d25bb868920da0f3780be8fcbbdcde21c4388b0eb4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://kuzutuzo.ru/wix?keyword=pasnew+watch+manual+pse-276g', suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/wix?keyword=pasnew+watch+manual+pse-276g
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5febc0ee28788.pdf
    • https://cdn-cms.f-static.net/uploads/4454420/normal_602b6b3a852aa.pdf
    • https://cdn.sqhk.co/wobuwozavenu/gf3ibhe/touch_draw_app_download.pdf
    • https://cdn.sqhk.co/bugabowozi/hfgjbp3/zakifolemu.pdf
    • https://cdn.sqhk.co/nazabimon/afjfzgh/2100371220.pdf
    • https://static.s123-cdn-static.com/uploads/4490961/normal_5ffd70b373443.pdf
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/latufigox-pepidekewubaj-sopurotimelebun-fuwokefubofuxul.pdf
    • https://cdn.sqhk.co/ninilevikod/japfahe/agrr_informatika_kpzs.pdf
    • https://zelekunidos.weebly.com/uploads/1/3/2/6/132682808/2937038.pdf
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/pefosiwina.pdf
    • https://cdn.sqhk.co/fedovipawe/tqibhcP/battle_command_mod_apk_unlimited_money.pdf
    • https://tepewumulu.weebly.com/uploads/1/3/1/3/131384412/migizamete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/387d4e20-dd9c-4808-92d5-291fee4519a7/2007_jeep_grand_cherokee_transmission_problems.pdf
    • https://uploads.strikinglycdn.com/files/c84f2bcb-d126-4e00-9f92-29d22320d34c/sex_education_season_1_episode_3.pdf
    • https://s3.amazonaws.com/vobuturinivi/backup_transfer_android_to_iphone.pdf
    • https://uploads.strikinglycdn.com/files/8777ad40-784b-4957-a756-f72fa0896244/monefuzam.pdf
    • https://s3.amazonaws.com/legipalofi/how_to_connect_an_ipad_to_a_brother_wireless_printer.pdf
    • https://uploads.strikinglycdn.com/files/fc27dd34-8f17-4fd4-b5a2-d2b3ed5afd49/2005_dodge_ram_patch_panels.pdf
    • https://s3.amazonaws.com/bipepezuwed/49803415338.pdf
    • https://s3.amazonaws.com/suxugipipolazog/libro_generales_de_dios.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/goodreads_app_apkpure.pdf
    • https://s3.amazonaws.com/sinadi/gesazajiron.pdf
    • https://s3.amazonaws.com/gixirojozogufux/google_sheets_combine_duplicates.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_off0000e4cd.bin
374c93a1ede2615f445a244846ba8f010188321f2eaae093906c3767b68c5420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 5740 bytes
font_01_sfnt_off0000f861.bin
5253b9bd03b5eaaf2d50c721ef9f2be09b96150172d1d89421a870b34981f850		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 12340 bytes

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