Malicious PDF — malware analysis report

Static analysis result for SHA-256 376795a9e530fa9d…

MALICIOUS

PDF

77.8 KB Created: 2021-04-05 15:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0830b9ca0416cb4d37ae4a0267920336 SHA-1: 12e83e8765665aa4445c2996c9acfce839f1c67f SHA-256: 376795a9e530fa9d82cc8d752ecfd930e3cf5f4eb7569384142694b2bc96e8e6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9991

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://golowaki.ru/aws?utm_term=how+do+i+clean+the+filter+of+my+dyson PDF link annotation
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/7805083.pdfIn PDF document text
    • http://justiciaforjustice.com/fugajokifimivamolerajaruvpzh9n.pdfIn PDF document text
    • http://normab-id.com/228743141658bn17.pdfIn PDF document text
    • http://fsbsiod.com/psd_templates_mockupulagz.pdfIn PDF document text
    • http://trudogoliya.online/student_internship_resume_templates4a90q.pdfIn PDF document text
    • http://blog-millionaire.buzz/xiradamubajateduyfd.pdfIn PDF document text
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/vapuxuzepev.pdfIn PDF document text
    • http://awpmode.com/xaxesuvabemamitugedumuxizus18d.pdfIn PDF document text
    • http://mbfsopg.com/vemaxuzepitixaxatepopedm17f4.pdfIn PDF document text
    • http://webcam-model.online/number_of_moles_in_2nh3hxj3x.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/00c767a4289.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/wuzivetobod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e59a30f-0750-4ccd-8d95-90a0c992375c/libros_apcrifos.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/alt_binz_en_nederlands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf10c50-231e-45a5-97c6-9fe2309964a6/how_do_you_replace_a_toto_toilet_fill_valve.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/guidelines_for_diagnosing_pcos.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/wezozitopinuxunudoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5153becb-0579-4581-9c66-3e77d466c47a/black_and_decker_coffee_maker_manual_cm2030b.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/20231196521.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/51084451563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea1e38a-d0e0-4150-af19-5a602d74b557/rikutenijunadawubeg.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/gufipanogeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/20273298749.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_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 5416 bytes
SHA-256: 48851ce201f4e2b8664499f6582f7e3daac814f217770fe38d78e81884c8556a
font_01_sfnt_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 2712 bytes
SHA-256: 48a5f28bf5e94810be2460657f34b0b9a20a4ad423bb835fb4241d1c2f8f4d80
font_02_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 10948 bytes
SHA-256: 83d8b79186e27ce30972e9edc89e19e688134d12ed09b84c0eeb8afe0e24c246

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