Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07d33852f8f7810…

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 05:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5ab4d2231d4f9a40c9534f056178ec6b SHA-1: 030d25b86e0b3eb8fd0b49e1059ba713a2d4bed8 SHA-256: d07d33852f8f7810692ee1384babb1e1aaed080c39b87e3f814ca545ea3799bf
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, with high confidence. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates a business-email-compromise pattern, suggesting the document aims to trick users into changing payment details. The PDF contains numerous links to external PDFs hosted on disposable domains, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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
  • 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 http://salonorganica.ru/upload/files/66922832420.pdf In PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/lewawozusedupupos.pdfIn PDF document text
    • http://gotween.com/userfiles/file///90530409384.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/bizumutagepulonu.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/16526312882.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/texuxixifusij.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///95151854938.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/96302058327.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/l2ib5lc9r341ftc7887pcabeagdlfd0q/91491158636.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/xadudirojovez.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/28247028236.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/zevizideruf.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/41350629002.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/kexezililotufozu.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/furediferujum.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/zewizabinujobobibej.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddd81125bd---rasimetobofuluzovolez.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/17339610553.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/doruzote.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/28449954369.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/98443995433.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/zoraxazovusagibager.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/90653139460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=convert+contacts+from+android+to+iphonePDF link annotation
    • 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_off0000d997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD997 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 18012 bytes
SHA-256: 6d699b58d16764db7dc382864b825fd12a276a456a06ec53e7bc667417f496bc
font_02_sfnt_off00011fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 10936 bytes
SHA-256: 7c6ebbc5d6d885c253b2cfde9d52a2fa60b6000a2a302af2d7b5f1660547d3cc