Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d6f6d3a0ee3b61…

MALICIOUS

PDF

78.9 KB Created: 2021-03-23 01:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f2b107d79b5265223e186f3cca14b1ca SHA-1: 542138622a07e6b257ce7db3d53b550be64466c5 SHA-256: 23d6f6d3a0ee3b610638614027e72b557272435340c61f10b8fad1857b3f8ef9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://lozipotod.ru/123?utm_term=functionalist+perspective+on+crime+pdf PDF link annotation
    • http://laketofetujeso.medianewsonline.com/33250466012.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/what_is_the_best_app_for_stock_market_news.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/metal_forming_analysis_wagoner.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/onkyo_tx_nr509_arc.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/gjd4iam/zuwutujix.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/bozugerowijaxonilokutabipay3xp.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/kajilixefigatigopu.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/rigol_ds1102e_100mhz_digital_oscilloscope_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/icJXd8I/stx_lacrosse_stick_goalie.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/gigjgsN/zobofadizafozo.pdfIn PDF document text
    • http://berasowugixo.mywebcommunity.org/possessivpronomen_deutsch_bungen.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/biology_class_9_cell_notes.pdfIn PDF document text
    • http://wowitaly.space/dikejigadisujxujvn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dasutako.rf.gd/13631601864.pdfIn PDF document text
    • http://gipetiwivi.atwebpages.com/asperger_syndrome_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97df7474-bc2f-46dd-9145-86185dc70c04/did_violet_baudelaire_die.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3a42e8-e298-4085-9b08-cf7df7b1f78c/questions_to_ask_a_management_job_candidate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcaac0f-57cc-4d8e-a5ce-5cf321a93b48/puwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0422a07-7efc-4fe6-b9b9-df44aa45ac7d/what_is_a_tropical_rainforest_habitat.pdfIn PDF document text
    • http://zedebepibepus.rf.gd/50900977989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243aec80-f3e9-4c2d-a641-d964b2ff1e7f/55342573028.pdfIn PDF document text
    • http://vegubom.atwebpages.com/compare_and_contrast_osi_and_tcp_ip_model.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 5316 bytes
SHA-256: cd84cef421a0856ea7c3109218d11363a4192048a38c25ae2b62f6e0e441a712
font_01_sfnt_off00010a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9E 10444 bytes
SHA-256: 7348c78885c6470fc9c9a259d53728ad855d0b8afbd93e516a148f7018d5d6d4

Open this report in the interactive analyzer, or submit your own file for analysis.