Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee738c922fa9dea…

MALICIOUS

PDF

79.4 KB Created: 2021-03-11 10:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b969c454abd3dbd8962fd4b39e3e44f7 SHA-1: 9eead3f68b0107eb521519f4a94c8101da38a9e7 SHA-256: aee738c922fa9deafa89379e82441a7549efd61061de68e38d09f7ff1e8a1b8a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. The primary URL identified is https://botokaw.ru/123?utm_term=best+book+for+c+beginner+free, which is likely the initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=best+book+for+c+beginner+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453342/normal_5fd33170b444e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_602493e7ced56.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/hp_elitedesk_800_g1_usdt_ram_upgrade.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/parks_and_recreation_episode_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447433/normal_5fece5b06282c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_602b01c965b00.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/neluxajapaj.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://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_5de80bc61363492f9db3b5247fe000c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2d0c23-8bbc-4a9a-9903-8e87379407b1/bakaxofapeneliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c710a526-03d4-4e87-b068-055e06b54db4/bofesevulifenaxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be33a40-0382-4e23-861e-39eda875f780/judifu.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/adobe_reader_for_android_2._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acbaa91-c782-4439-b2d1-bf9842ce5216/wutigebem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38202579-1825-4ac7-832b-e80bad6dd525/how_long_does_it_take_to_become_a_vet_tech_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b835335e-ffdc-41db-9bf2-92120f79ae81/what_should_i_get_at_dunkin_donuts.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/dna_template_and_non_template_strand.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/kusuzelozane.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_79c69667ef554f138206e57701afb42e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc3fb1b-0545-4eab-8279-33764b80e6e4/rosemount_pressure_transmitter_3051_price.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_31d02fff9f194bc3a53be54cd8544b2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74ae6e9-f1b2-43f2-b665-6c55531ad694/81429348831.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/lisofulokizo.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_541fa680ca734b3b9783ec59ee6122a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/97912357458.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/xuvupagibuwidirujaviravu.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_df2fb8b44dc7496bae6c06279e71505b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 4848 bytes
SHA-256: 228c5323cbbed4f608b11648ccc5b090fd1b8e95c31b4da5405aa53ed10666bf
font_01_sfnt_off0000fe26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 10332 bytes
SHA-256: 14bb591ae33d97dd50b5ec0e5e6dad73cffbe120e2e8ddc0aa008a2761097524
font_02_sfnt_off0001218f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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