Malicious PDF — malware analysis report

Static analysis result for SHA-256 280110691d0826d3…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 20:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1e8b736949f6a5e7b8347cbdd9bae7c2 SHA-1: 9ca9e895efb1c71d0c154f44324cf9f2126b7baf SHA-256: 280110691d0826d30b46c78ca7761a25ceb3edc3f9425db198091d1747c67506
134 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 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 6

  • 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.
  • 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://pelibifir.ru/award?keyword=bachianas+5+partitura+pdf PDF link annotation
    • http://docita.fun/which_router_works_best_with_verizon_fiosh5pjo.pdfIn PDF document text
    • http://omshop.space/free_model_airplane_planssalu5.pdfIn PDF document text
    • http://apeech.ru/hp_probook_4540s_i3_release_dategu0sr.pdfIn PDF document text
    • http://remontnatali.ru/dunevanodujulidakzvczk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_602c1c918c079.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/vKjcig3/bee_vision_bumblebee_ar_experience_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_60061d4fc7b71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501645/normal_5ff90b0f9d8ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fcdac39a21df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_60498213b19e5.pdfIn PDF document text
    • http://salearea.pro/bhojpuri_film_song_2019lc4re.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/hitPCif/68305037198.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/HhjF59M/entergy_mississippi_pay_bill.pdfIn PDF document text
    • http://sparzha.club/pujapolatt87v.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://uploads.strikinglycdn.com/files/1562e880-7486-4df1-830e-856e380e025a/buliradovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09dd8002-0b6d-41c6-a0fb-a36f336a9c99/the_new_strongs_expanded_exhaustive_concordance_of_the_bible_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9e8ea8-a513-4336-bc31-94da9b064082/90082548481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498471a4-e710-4521-a88b-23bb1bedc9d7/fenaropukipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc54e1f-80f4-46fc-8bea-1908bbac2512/zibitivuwosuxuruzomope.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 5040 bytes
SHA-256: b1f00bb80c7f6d817856aed8d9be163f2f85b28956fe6a353fb0f30280d686db
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 15796 bytes
SHA-256: 16fdbaf60a7f171e2a650a8ce23a80427c3917aa631290b4df6486d0494a48f5
font_02_sfnt_off00011803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11803 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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