Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bc79f9c415c1c4…

MALICIOUS

PDF

77.7 KB Created: 2021-05-11 18:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6dd4f2d262ec6b41efb9a01bb5be2c6f SHA-1: 5a40aab0c1aebc60367a58f3c6590b2c417a5d5c SHA-256: 37bc79f9c415c1c4c18d0e242395482ce1eca674dbf1fe73807b87492feb9aae
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to 'Samsung s20 ultra release date 2020'. The presence of a large number of external links, including one to 'gimoguvi.ru', points towards a phishing or content-scraping attack pattern. No scripts were extracted, but the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=samsung+s20+ultra+release+date+2020 PDF link annotation
    • http://ratulave.22web.org/digi_002_rack_driver_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/ieiaS52/fexakijipavewinuwafin.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/EjaiaTU/text_twist_free_online_gamehouse.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/j0iivEU/sheetrock_all_purpose_joint_compound_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/Jjhjfjj/baked_pork_chop_recipes_with_applesauce.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/ggidGVT/rc_flying_simulator_free_download.pdfIn PDF document text
    • http://vejinow.22web.org/sunbeam_heater_instructions.pdfIn PDF document text
    • http://fevozogu.iblogger.org/6487894617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godosuluto.myartsonline.com/9035752369.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_14a6ea280b80482abe8bfd644783f280.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/arya_2_instrumental_ringtones_free.pdfIn PDF document text
    • http://wexugemo.epizy.com/gasimot.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/91399032252.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/against_school_uniforms_debate_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/zofezubafafenutumivuxipom.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_f281bac56403487e8d4f55d59cb7f960.pdf?index=trueIn PDF document text
    • http://solexojimod.rf.gd/77586293200.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/swimming_pool_design_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/car_eats_car_2_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/3901121200.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/71212864467.pdfIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_b07a6db1b50249c8bf107fb857adf29f.pdf?index=trueIn 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_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 5520 bytes
SHA-256: 32d0a05902afda21a39fb3440028ee27ee7527190a40d3a15c56d20730c7dd4d
font_01_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 11112 bytes
SHA-256: 56aa91ae24d2bcde9fb54a62979eb23b6d3ac1b853a922241d81f7387489f37d

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