Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f62a28b2d631065…

MALICIOUS

PDF

92.8 KB Created: 2021-03-17 05:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 24a68528237310ccdc156f1f0f8d8a4e SHA-1: 7b9b8b94e13a2c554e37074c17612e24e118641c SHA-256: 1f62a28b2d6310651c51806a6f6726b01637be5cb9fb65bddc92622f120082de
134 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. It uses an urgency-based lure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/wix?keyword=lease+purchase+agreement+for+equipment PDF link annotation
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/kopuwapujuxed.pdfIn PDF document text
    • http://lepawarowupi.iblogger.org/long_hand_multiplication_worksheets.pdfIn PDF document text
    • http://tertov.xyz/alcatel_a392g_unlocklufu0.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/gh8Bt3S/shark_ion_r76_vs_roomba_690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470979/normal_603963a3a3c92.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/hgijiif/bebera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424632/normal_6003891119ff7.pdfIn PDF document text
    • http://tixshopclub.space/how_to_search_using_imagesv2bl5.pdfIn PDF document text
    • https://nefagowilad.weebly.com/uploads/1/3/4/7/134742945/duzuzuduperazexopes.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/8562767.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/QdzGHjd/exonerate_meaning_in_a_sentence.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_602f752e8b4fa.pdfIn PDF document text
    • http://wofatis.22web.org/99485025904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_603a204f20564.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/mifudurilotavub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_603cb72f93abc.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/2e242a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sasomibaben.rf.gd/cunto_dura_una_infeccion_de_orina_si_no_se_trata.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

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_off00012d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 5464 bytes
SHA-256: 2e50d9acf3b189ae474227d470b1033949271b9d40c69f4e11f5643c32ee3e1e
font_01_sfnt_off00013fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCE 11384 bytes
SHA-256: 2ab301523c79530555668bfd3e7e3006bde4035e60d2baa24120bf74a3748f28

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