Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a7311779a376e4…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 10:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5cae69dfefd8ab84fec146a9a5a8b40f SHA-1: c0b50a7b63d1ea4bd873fd262bfd04ff0e1de645 SHA-256: 36a7311779a376e428fce94ea7cabbfc9a381ebc4040e3d8a09d379e37316af2
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=what+does+walmart+pay+for+night+shift PDF link annotation
    • https://cdn.sqhk.co/puninuzono/eZfhb7L/birds_color_by_number_pixel_art_coloring_book.pdfIn PDF document text
    • http://markettop.pro/nordictrack_c_700_folding_treadmill_with_1-year_ifit2umah.pdfIn PDF document text
    • http://agnewjacobs.com/motogp_schedule_channelq5fyt.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/kgibgft/cat_cake_jumper.pdfIn PDF document text
    • https://cdn.sqhk.co/fomanazoravu/WCQhenr/zuduvu.pdfIn PDF document text
    • http://profapp.pro/95107319720l45v3.pdfIn PDF document text
    • http://nodebefituju.iblogger.org/psychology_themes_and_variations_test_bank.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
    • http://batefagut.epizy.com/annotated_bibliography_mla_format_word.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_acb99155cc944d6e9254e0158f639994.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c7a14a-5c80-45ed-8294-30db709b4b5e/sapudilaguleremesok.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/levanaxamabamaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903cd9bf-4706-4f8b-b1fc-f5d018d87854/3d_drawing_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/woxitodazowalitu.pdfIn PDF document text
    • http://nagofubufi.epizy.com/aitchison_college_job_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4e99d7-48d0-4d45-b4ab-9d24ef396e7e/eureka_forbes_vacuum_cleaner_specifications.pdfIn PDF document text
    • http://mutoris.rf.gd/sevosimuvasirarazadaxupi.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/niriduj.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_c0e7123100fc4134a5f50f7518928508.pdf?index=trueIn PDF document text
    • http://kiduvunizujenav.rf.gd/github_documentation_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8f3585-3b88-4b7f-b5f3-f7c1c288ac16/7th_grade_english_worksheets_free.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_off0000e279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 5452 bytes
SHA-256: 51c1446acc2d2fb16b1e55843dde384370d3e0abde5dc9362bf2295ee5be1641
font_01_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 10580 bytes
SHA-256: b17ce3e464495b0e769877dc4523b1282e9c2357a75bb3bbd67c79a3bbd1f950
font_02_sfnt_off0001191f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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