Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f1e3fb72e7d7f7…

MALICIOUS

PDF

97.8 KB Created: 2021-03-06 23:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9846cb65d2643e446174503bfcf8ba44 SHA-1: def8cbba80d65e9785487d70435ee273a86cf0ff SHA-256: 33f1e3fb72e7d7f76290a2856a67f63601556fc02d0c6e8294f3a5c873af83e5
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://xezojetit.ru/strik, is likely part of this campaign to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=how+to+remove+warming+drawer+kenmore+oven PDF link annotation
    • https://cdn.sqhk.co/gadapapar/ighD0ic/new_wallpaper_hd_pubg.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/WS2F65q/95937758708.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/DS16Mhg/family_history_of_ovarian_cancer_icd_10.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/whirlpool_duet_dryer_troubleshooting_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/shfEjgY/duetto_movie_netflix.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/9545373.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/crBljip/space_conquest_3d_apk.pdfIn PDF document text
    • https://wipovatoz.weebly.com/uploads/1/3/4/0/134012317/durud_wijoju_zopesotekuzapol_rijewulobosu.pdfIn PDF document text
    • http://jisilasi.22web.org/wubikewukizixeginu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosigegu.onlinewebshop.net/44497313720.pdfIn PDF document text
    • http://vedaremix.epizy.com/butterball_electric_turkey_fryer_instructions.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_595d4c4004c143d095285709da70f91b.pdf?index=trueIn PDF document text
    • http://fijijap.rf.gd/guide_words_worksheet_2nd_grade.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_d0485db2fdb04edcb45cb2a018c22185.pdf?index=trueIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_585ad3694857478d96b2e374e4138dd9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/report_of_the_adaptation_fund_board.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_1124c02b1c2048659eab464b95200f69.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_cf35269dcd52460e8d80a154b405a090.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/nevopobalesirezubezata.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/dufedigi.pdfIn PDF document text
    • http://veguvegonuz.rf.gd/what_is_wrong_with_my_maytag_centennial_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/kirby_sentria_2_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/5943156385.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_off00013f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F20 5112 bytes
SHA-256: 7d882637562c12429a05b0c12853df00c74c1387a02544031be1132ca0f2c219
font_01_sfnt_off00015084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15084 12116 bytes
SHA-256: ae17deee5790d981d56c141b58199bf638404a4ff4d29754a8f4bbf3c139393a

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