Malicious PDF — malware analysis report

Static analysis result for SHA-256 620e843e745818ab…

MALICIOUS

PDF

78.3 KB Created: 2021-04-05 03:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e6d2e8208c35eaf3ec9f696533053cb9 SHA-1: 563e8c30937402202416d6298a4c0cad632327c2 SHA-256: 620e843e745818ab9b8cbf3a41ee4d9c494ec413b3d0c5851cd2c917541cb57e
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 0.9997

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://kuzutuzo.ru/123?utm_term=shower+door+guides+parts PDF link annotation
    • http://trendmobile.ru/sovivosazidus0yc5n.pdfIn PDF document text
    • https://jikezukirex.weebly.com/uploads/1/3/1/3/131383594/5048728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_601bb40218f49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409394/normal_6002c86e239e1.pdfIn PDF document text
    • https://jenevokitajawol.weebly.com/uploads/1/3/4/2/134235402/68122ac2ce4aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_6068db87b640d.pdfIn PDF document text
    • https://pebarefilegiz.weebly.com/uploads/1/3/5/3/135325086/fawapemanuduba_kodijob.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/rewujodele_wosuwaroz_jotukunizulip.pdfIn PDF document text
    • http://xenotobewaf.22web.org/lotiter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5fe504bf4b975.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/58284b628.pdfIn PDF document text
    • http://betmoy54.com/what_is_expense_reimbursement_revenue_in_real_estatejfowv.pdfIn PDF document text
    • http://centerbluebadge.com/podezela009zm.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/734a8663-37b9-4175-9497-77b2af38b4d3/jidogozogepabuvojosam.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/57128746384.pdfIn PDF document text
    • http://nazifaba.rf.gd/60476054864.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/jodekexozokitotaw.pdfIn PDF document text
    • http://guruwemuzotal.epizy.com/21028558079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab7e3ab-cfbe-4097-ac0f-c1755c2f99fe/marantz_sr6009_dolby_atmos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f16580f-0c1a-4684-842f-da60459f3f3d/julian_date_calendar_2020_quadax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 5160 bytes
SHA-256: 03e487810d65e9c1a2b600334348d5c691a144c5252114efab5c315a89c18cc3
font_01_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 10776 bytes
SHA-256: d974f3f3f4c4607fb0f05485dbc89793c1f2b9895e6adadf8bbf9062021bb3d3
font_02_sfnt_off00011d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D81 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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