Malicious PDF — malware analysis report

Static analysis result for SHA-256 7372d7b955c1b6d5…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 17:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e4fac0ce3dd4e4a02d82a712fd9e9b58 SHA-1: 14278a56108c06cf07681a4e7b94b5ab7dcbcd34 SHA-256: 7372d7b955c1b6d52eb16eb20842b0067dacecadc379fdd07d0d7a0d22206856
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious sites. The presence of urgency language further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=gallery+to+snapchat+story+android PDF link annotation
    • https://kangaroovietuc.vn/webroot/img/files/bajufa.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/wezuvirijisukogijebi.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/barilefepo.pdfIn PDF document text
    • https://davaocarrental.com/images/file/92278622494.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/48429926577.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fac6c58af0---69000899454.pdfIn PDF document text
    • http://visoda.lt/ckfinder/userfiles/files/zomoralobetifiveratad.pdfIn PDF document text
    • http://poultech.net/d/files/51762911832.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/52189476739.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210914115106.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/wedup.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/67046253418.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/lidawodevoj.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142117976e89---xitesinupolowusazotapufuj.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/vewobetenopevegivut.pdfIn PDF document text
    • https://paradigma.bg/uf/file/dimofupugijik.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/aa9cdf.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/dipemunepinafibugi.pdfIn PDF document text
    • http://qwerty.pl/_data/file/14620314947.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/36906650432.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/63349021539.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://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_off0000d2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 17980 bytes
SHA-256: c80cade3189fb7a1c3c28ee4fe0cb785c804cffbaaf01dd3e85463fd2bb44f20
font_02_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 10764 bytes
SHA-256: 386cf681afb57311d38ea3fa37f6e5116d2ddaa0ec94ab57b2a7e6b804c570bd

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