Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd5f9255409b507…

MALICIOUS

PDF

166.2 KB Created: 2021-03-11 12:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 57e7296e9a59be3432f3cc7fd4a583c4 SHA-1: d67b792bdc71c804e84040e541926b94b4d99095 SHA-256: 0cd5f9255409b5074cecb887fe5c786a506b195b8e5c023beadd1942d1cbdf3e
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 0.9988

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://jottigo.ru/123?utm_term=metal+carbonyl+clusters+pdf PDF link annotation
    • http://tepugorotewole.medianewsonline.com/52872192277.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408996/normal_5fe31c28713a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_60047dbc2d6b7.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/39487831511.pdfIn PDF document text
    • https://rubusabulolow.weebly.com/uploads/1/3/5/3/135326577/9e4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_600fa58028c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464850/normal_6032f0cb17b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_603e2dcad16ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5fef44ab60974.pdfIn PDF document text
    • https://butoxuxesadi.weebly.com/uploads/1/3/4/6/134699311/ribowawigesavot.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/45956447279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384472/normal_602ee11dcc68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_603da7226fb16.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/infinix_note_7_phone_price_in_kenya.pdfIn PDF document text
    • https://bisofojud.weebly.com/uploads/1/3/1/6/131607445/2433776.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/the_chrysalids_chapter_9_and_10_summary.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/sajesibemapiworakam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_602a233accc9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/zikagulerexenoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/58557160703.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/happy_birthday_audio_song_free.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
    • 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_off000230d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x230D1 5396 bytes
SHA-256: 538e358566cf9db38bbe5da35ebf36851ad1e81d261ead1dbbbda4d31d9dc108
font_01_sfnt_off00024349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24349 16420 bytes
SHA-256: 1141d87d5cb6d64187ba6a07a5716f09874bc9cc379e696b525c56397a4ab1ef
font_02_sfnt_off00027610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27610 16084 bytes
SHA-256: f6dd43097ff77a7644066d793246590a76b2fb03a803bff94e9fefcac70f68f1

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