Malicious PDF — malware analysis report

Static analysis result for SHA-256 07224f2b072eb8c9…

MALICIOUS

PDF

101.8 KB Created: 2021-04-02 06:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74aaa337dd5bfde6bb1ebc31f33f61b7 SHA-1: 59041991173d3f7cd4a02fb436ffb24899e9693a SHA-256: 07224f2b072eb8c980fa35a1bfc033a3b668174daacfd80c3322bc5b9d4bdf56
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://xajibur.ru/aws?utm_term=rarest+genetic+traits PDF link annotation
    • http://sodaapp.pro/xobijobakofa0517k.pdfIn PDF document text
    • http://netusikofigo.22web.org/picadora_de_verduras_manual_cuadritos.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/hlfZthf/tedafefuwububobidutejo.pdfIn PDF document text
    • http://djami.ru/effect_of_different_sugars_on_yeast_fermentationbm8bo.pdfIn PDF document text
    • http://sokolov.fun/buwepixufomerivoxqi69e.pdfIn PDF document text
    • https://cdn.sqhk.co/lukizigerex/gf7uge8/58553729456.pdfIn PDF document text
    • http://ririzobe.medianewsonline.com/inherited_disorders_of_lipid_metabolism.pdfIn PDF document text
    • http://dihtyar.online/set_me_as_a_seal_clausen_lyricskr8fe.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/manual_seiko_7t62_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexojupi.rf.gd/13193623456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e6901c-1234-445a-9a4f-c9dc56aa928f/minn_kota_ulterra_112_will_not_deploy.pdfIn PDF document text
    • http://nixutiwo.rf.gd/3412220742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd70a78-6437-4caa-ad33-a0aa26da1f92/pasar_de_ml_a_gramos_con_densidad.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_10bd04c153d240b290da92a196818ddd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9119f7b-a229-4e6a-bd98-28dc400fb999/93568583683.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_104cf5a2a7734259af00ec0907c0fa38.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EF 4940 bytes
SHA-256: db960231f74eafec49e8c75db001f1cb89e5ee3c6120d997fc6088fbe890085f
font_01_sfnt_off000146d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D6 12736 bytes
SHA-256: 72b643b2eeb8cd878dd778b74019800e98f6c86feb7994663da2276f6d3c568a
font_02_sfnt_off000171ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171CA 16448 bytes
SHA-256: 2005c6d71ddea7491f405c2abce188de7b61b5ebabf82fa7ad667a51eeadff51

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