Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e72fe101181763b…

MALICIOUS

PDF

82.1 KB Created: 2021-03-19 13:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 510e5f0738a78a7fcc1227ef2745b312 SHA-1: 8a1ffd385b147c02ff104eb4f12abf9d8c341119 SHA-256: 1e72fe101181763bad893b53ce72eb88042b4d6f51f34aefb72735a7924c1ba9
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://kuzutuzo.ru/wix?keyword=comparing+fractions+least+common+denominator+worksheet PDF link annotation
    • https://cdn.sqhk.co/zolususux/cGmtjix/callaway_2019_supersoft_matte_red_golf_balls.pdfIn PDF document text
    • http://revujutipisan.22web.org/18706060041.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/Sjahjhg/89285020103.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/2875944.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/hg6ibkV/warship_blitz_best_battleship.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/idGji3f/human_papillomavirus_infection_symptoms_in_mouth.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/fokapukukazojopabo.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/FAgfKR8/kobumanejegusuladat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_fbd6a2ff3e1843f3b901c4aee24c0a4b.pdf?index=trueIn PDF document text
    • http://tikimolanevi.rf.gd/classify_quadrilaterals_worksheet_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58913ec-ce79-455e-a7c7-be43659e02a8/are_lock_picking_sets_illegal.pdfIn PDF document text
    • http://vajowevub.epizy.com/98975444632.pdfIn PDF document text
    • http://jovozovoxisuno.epizy.com/2445009924.pdfIn PDF document text
    • http://lejafutizi.epizy.com/lasotuwimowolov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f0e31c-b7fb-4b33-9d05-539af999b8c7/phrasal_verbs_lista_e_traduzione.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_716881fcd2f1477985c40fb05a4c6d09.pdf?index=trueIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_d7cba472ed7b4d438055fdece6216719.pdf?index=trueIn PDF document text
    • http://daxafedijumexir.rf.gd/48712158058.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_f50b452cdad54821999f8c21625a630c.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10107 5632 bytes
SHA-256: 03da3640e688ffb3da7e1922025f433bf79088f4d17f204d23c86fd67cd918eb
font_01_sfnt_off00011412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11412 11140 bytes
SHA-256: 9ea9e64620fa7f3cb3cbfb40663764a9d6e3f56fd71f7627285eccdb687a9698

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