Malicious PDF — malware analysis report

Static analysis result for SHA-256 21cd2014ac7c693c…

MALICIOUS

PDF

86.1 KB Created: 2021-09-16 13:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 022c1d0661a55e180f82ebd74c708d6a SHA-1: da5700a3994e494a67979c448e0ca81390a714a2 SHA-256: 21cd2014ac7c693c2e8dfd9abd20d79d5ef1ea785cbb3501f3ed72820613a748
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains multiple heuristics indicating it's a lure for payment redirection and brand-impersonation credential phishing, specifically mentioning iCloud. The embedded URLs, such as 'https://philabc.ru/uplcv?utm_term=cara+recovery+data+sd+card+android', are likely used to host malicious content or redirect users to phishing pages. No scripts were extracted, but the document structure and embedded URIs strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://philabc.ru/uplcv?utm_term=cara+recovery+data+sd+card+android.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://philabc.ru/uplcv?utm_term=cara+recovery+data+sd+card+android PDF link annotation
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/9ed50ca6a383934731ea1d0fe7e35516/7952302940.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/dezisugodikazinumesesu.pdfIn PDF document text
    • http://all-premium.com/user_file/files/lokilesupugezenenebugem.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/kimepofaxiriru.pdfIn PDF document text
    • http://packturf.fr/files/94014289855.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/pixovak.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/pinugojogagopowudaxutekok.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/seviwi.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/kegiwomumunaduneponigan.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/5973598671.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/duripunerirituk.pdfPDF link annotation
    • https://ctcitsupport.com/media/files/limegenabiwetirikugu.pdfIn PDF document text
    • https://thehouseproduction.net/file/86663236662.pdfIn PDF document text
    • http://robbes.nl/media/files/kibijafumopumaw.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/towevedej.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/89230603449.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/70227308540.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/71650653358.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/83406342005.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/suzitixanebisejifizutot.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/kujezogipagalipoxabaxej.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/84163185187.pdfIn PDF document text
    • http://land89.com/ckupload/files/46714455524.pdfIn PDF document text
    • http://dges.in/userfiles/file/zuganatok.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/wejudegerulej.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_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 20868 bytes
SHA-256: a248eb44378c1a6b9a7d18bb2b233a71e6126f01ce3235b66f3a87df88089f7b
font_02_sfnt_off000132ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EC 10528 bytes
SHA-256: 3af67d00975786292ea65f16bbfa95d69a2cec748d3c46d4d177d1fbbdf71053