Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20bd3964a8a04a3…

MALICIOUS

PDF

80.1 KB Created: 2021-02-27 18:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a7c760c38f2fa26aa4eebe3506499f29 SHA-1: 96faef1c48338422d6d1cd2690e80886574ef4d8 SHA-256: d20bd3964a8a04a39bf84c5fa2cd46d2c701f026c94f99c36348bb0f48b018c5
194 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/123?utm_term=learn+hindi+english+app PDF link annotation
    • http://waniwidolo.66ghz.com/89890776102.pdfIn PDF document text
    • https://kagujovo.weebly.com/uploads/1/3/5/2/135298661/4e47124.pdfIn PDF document text
    • http://lonagonem.22web.org/native_american_buffalo_facts.pdfIn PDF document text
    • http://vodoroding.info/what_is_dog_mange_with_photosngsd3.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/jcRjcI0/ocean_rift_oculus_go_review.pdfIn PDF document text
    • https://vesepogexaxun.weebly.com/uploads/1/3/0/7/130740074/0b8a9346b8c4828.pdfIn PDF document text
    • https://fudaxanoduvilu.weebly.com/uploads/1/3/4/6/134626593/6121645.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/fawakuxi-dimoku.pdfIn PDF document text
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/riwaxelav-pelomo.pdfIn PDF document text
    • http://idealslimitalia-official.site/acronis_true_image_2020_upgradedcjz8.pdfIn PDF document text
    • http://rusedewafizurap.66ghz.com/go_guidera_o_connor.pdfIn PDF document text
    • https://tiwamufeg.weebly.com/uploads/1/3/1/8/131871705/1998715.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/gimavelavona.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/nugalifonivozej-fujixed-vudixamoliso-logodez.pdfIn PDF document text
    • http://mon-cmbretagne.com/bryant_plus_90_filter_locationl7oju.pdfIn PDF document text
    • http://tazogupiwelul.iblogger.org/sheet_pan_veggie_fajitas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zozoresupiz.epizy.com/sample_attendance_sheet_for_meeting.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_off0000fb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8D 5164 bytes
SHA-256: 6fe143f18780ab40c0d2c3191f165a0a75dbeac16b4aa9db7de75c55b9f3ea75
font_01_sfnt_off00010d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1C 11336 bytes
SHA-256: a673a4dd2c5ef252d5eaf8e609f5224254fb804199bb5abdec24592358203352

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