Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb2e0fcb09c9fb4…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 18:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03e39acdbbd12ecf2c796698713bdb1e SHA-1: 096ed631b2389b845dc73c413e48098018158d35 SHA-256: afb2e0fcb09c9fb4d72e5a1bc209dee287bfeaf181a221fc7deb2f68366fa569
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 0.9998

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 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://vilenefex.ru/award?keyword=preeta+s+drawing+book+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476127/normal_5ff534f1ef6fd.pdfIn PDF document text
    • http://medicinfo.online/prosperity_party_ethiopiadplxv.pdfIn PDF document text
    • http://circulshtangcalip.website/jio_video_call_apk_free_downloadzj3ao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_604e3e789ff54.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/idgcj7y/stair_runner_rugs_usa.pdfIn PDF document text
    • http://logvoz.ru/wewosanonesedac1vno.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/djiaLgf/bezuxavelavevibabazez.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/IigohaM/tefebubatubas.pdfIn PDF document text
    • http://lifegirls.site/game_booster_apk_freectivz.pdfIn PDF document text
    • http://kozlo.space/carya_cordiformis_seedcl7n8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_7eda0e9548e94909a6393589acc4a5d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e0c9cb-6369-4056-baa8-1a87bb83db40/bemazigasagojolawekusarem.pdfIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_36b752a9b16949e09d8bde11a488556c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0df8b535-539f-4511-a8d5-22f3dadb93e6/asp.net_mvc_4.0_sample_project.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_1d1d4e81510446feaca2430092aedfbd.pdf?index=trueIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_23087c9456784b6e820d639a9c402cf0.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_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 5504 bytes
SHA-256: d8de5b68f03f516565f35e648e5a9b841d5f5bb0bd151c0b4d923a1409b9af58
font_01_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 10668 bytes
SHA-256: cd07dd74702a30b407f659336e18b6006cd19df96698f1b7a97c15a395fbdc04
font_02_sfnt_off000115e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 3168 bytes
SHA-256: d39cd40abbc9728797d0ef852ae4acda975e86ad3b804bc450147dace7029e0e

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