Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46ebdc3ec3fb986…

MALICIOUS

PDF

79.5 KB Created: 2021-03-22 17:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1220805f3af1574819ad5bc6c5b03f49 SHA-1: 1e3cc40cb474268559119e22e9e71ecd4cf2709b SHA-256: b46ebdc3ec3fb986bbae296d6d956c592f592eda791445695a9eee6ae14bdfb4
186 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. 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 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.
  • 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://bologen.ru/wix?keyword=las+ramblas+course+guide PDF link annotation
    • https://cdn.sqhk.co/nolagutotato/hghjh7I/t3_ribbon_forex_day_trading_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/UhcgDgf/48439847891.pdfIn PDF document text
    • https://cdn.sqhk.co/zerumowo/jjggNvc/doctor_on_demand_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/jf01jho/versatile_meaning_in_bengali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fe6f0d7c01b5.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/WjgjbhB/57745601417.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/arithmetic_sequences_and_series_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_60092c0cd1f41.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/8Zkrgje/terrablock_machinery_pvt._ltd.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/jgjT1p7/fallout_shelter_special_for_exploring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427086/normal_6003f81261f7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5ff7084de5ef2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunogasagi.rf.gd/94054750050.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_6420d6284dda418089dda2911f223932.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf0174f-87ec-4171-ac21-25066c308f0b/37629027298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70212058-31de-4081-a0cb-24186a85418d/citizen_eco_drive_wr100_watch_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06632b04-b81b-4e6f-9deb-6235c01ca76c/13953373047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0276a1e-d415-4de5-8b22-9e5170242764/25683689083.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/61477008946.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_03561d38b3404a84b42abab65bb862fd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 5340 bytes
SHA-256: 79d05bcba686f1cfc74e500d0c174ce42b9b3e155a1f3696c9737c7814d6749e
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 11660 bytes
SHA-256: 0361bdd28bbf32b81726c373a625b2ade899b4fd6014bd59f9c05f42f0576630

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