Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce28a43396c08be…

MALICIOUS

PDF

69.4 KB Created: 2021-05-17 03:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e51e1415ecf705102eb02a1ae69606f4 SHA-1: 531721c46940b85e72b53886fa6e880448fee905 SHA-256: 1ce28a43396c08be94f9a791f8aac511ade732ba3c9ba421814143bc60a33251
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 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+unlock+ipod+nano PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496586/normal_60530593dfa40.pdfIn PDF document text
    • http://raxuzasi.iblogger.org/kajumozitabopawixika.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/ih5ghgc/38855282423.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/polisofabaxebiti.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/chfghjh/39699256246.pdfIn PDF document text
    • http://ridegibulas.22web.org/mathematical_modeling_tutorial.pdfIn PDF document text
    • http://pakimudemezir.iblogger.org/pezigi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5fcc08bd3c109.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/jNiezrl/bigulepemubafojup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_606e22adbeda8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxeladigono.rf.gd/how_long_are_old_navy_orders_taking_to_ship.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/jepisasezozexoxude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef1d65b-50a0-4cc6-a700-75a12f441071/69428796018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73625688-11c5-4a61-ad24-115a73f65ab1/who_sells_morning_star_bamboo_flooring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2dfaa29-c7ed-4804-8422-4a14052dfd3e/jipisot.pdfIn PDF document text
    • http://dunugamufaj.epizy.com/is_life_but_a_dream_poem_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/how_much_does_it_cost_to_have_a_sunsetter_awning_installed.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/5378551561.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/bofigotugotasetojon.pdfIn PDF document text
    • http://tefosotolubexob.rf.gd/apc_smart_ups_3000va_lcd_rm_2u_230v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdabdcce-75a8-42b6-8e1e-ce52dffebcaf/77539780262.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_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 4908 bytes
SHA-256: cfaacedc08bb4db4c6caa622854658b34e8dc7199e4b96bf486a7c692ebb552d
font_01_sfnt_off0000e3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 10472 bytes
SHA-256: 7a24c035e0d171af8d81791012d8260381eaf4a0d7b367ab48fd2a451abac70f

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