Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aad6b7be337f338…

MALICIOUS

PDF

84.8 KB Created: 2021-03-27 14:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 991fcba352cb131170e70f35f87da4b2 SHA-1: 54c437de1a4381a6ef5e101b900037d1c58b8d6a SHA-256: 7aad6b7be337f338fef6e7e22ea87c34bb5d1827f1d6fc98d301a7bb523c11d0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://botokaw.ru/strik?utm_term=what+does+the+number+333+means+in+the+bible', is suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+does+the+number+333+means+in+the+bible PDF link annotation
    • https://cdn.sqhk.co/wemowubire/gthhVmB/the_trip_to_italy_movie.pdfIn PDF document text
    • http://nofowopomi.iblogger.org/aarakshan_full_hd_video_song.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/kanobafojatejujexumiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/Ly3UgdA/wajovererilojamuni.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://uploads.strikinglycdn.com/files/36af6026-d464-486b-932b-1871cd55273c/is_harry_potter_8_coming_out.pdfIn PDF document text
    • https://2ae8fa2d-8b21-4cd7-bd94-b44763fb9b4d.filesusr.com/ugd/8e1ec7_b8f75436a1d2428b9f9773611a8750fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobaziw/52826807591.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/how_to_program_a_spectrum_remote_to_an_emerson_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/atrial_fibrillation_guideline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64bb27b-9df5-45b4-a2ea-1fb4fb03b0eb/fly_tying_materials_for_sale_in_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6393b679-4666-4946-a174-f6ec2f005feb/sears_12_belt_drive_band_saw-sander_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/android_online_emulator_extension.pdfIn PDF document text
    • http://zajepatexesa.epizy.com/double_bar_graph_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29722c5-6608-4d19-a03b-bf5738efbb4c/sagemcom_fst_5260_port_forwarding.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/causes_of_the_civil_war_video_worksheet.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_0fadcf7ea5314390863b758c7192e214.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_80f9a7f2f713467d988075042ffa7c64.pdf?index=trueIn PDF document text
    • https://721ea522-a1f6-4523-903e-24b3c8014629.filesusr.com/ugd/5a834c_68f7d8244e15476e966fb2a7eaf7f89b.pdf?index=trueIn PDF document text
    • http://nokudumufax.rf.gd/42906825072.pdfIn PDF document text
    • http://gokemebazeroxe.epizy.com/compare_and_contrast_text_structure_5th_grade.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_0dc8111f14994e53a75223a3d90fb766.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc640fab-2a84-4638-ac30-8df784888a61/1746282406.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_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 5264 bytes
SHA-256: 13c228e7ab7f76f7831f08c37ec92aedfafb15c0249e8dd2862ca7c903896272
font_01_sfnt_off00011334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11334 10564 bytes
SHA-256: d9552209f0294a9ff089e65ba2d710f12fd9b67206e1bbffe06e5d4de23bab7c
font_02_sfnt_off0001371d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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