Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4001b547383e0a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-28 18:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ac618b692fd9b38ea87af86c06a70ee SHA-1: ee37778f53e924f4100cd13c4b5456ec22b034db SHA-256: cc4001b547383e0afa1e25428d94cc6e6858d5e5dc12f5d4059ef30bcf59f1ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the nature of the PDF heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://archism.ru/uplcv?utm_term=save+photos+to+sd+card PDF link annotation
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139b47346540---31136540113.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/79467529158.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/29705506506.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/47256005775.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/75559262497.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/46214241824.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/35882902349.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-4/20210904213153755064.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/luxixivis.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/34627776436.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/kukikagonedema.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/34205053017.pdfIn PDF document text
    • http://vodnik48.ru/content/file/63578064018.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/solajebavejotozutur.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/22573361079.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/80290160994.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/kotuxizelilezugo.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/ginudimazul.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/19360190306.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/litulux.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/dfb6364ddddf5908e06607ad67492017/27726003007.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/55141486025.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/napikakufilorobasi.pdfIn PDF document text
    • http://konberdbio.com/upload/files/kevoluduba.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_off0000b912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB912 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 10512 bytes
SHA-256: a34e304a37a3f7fa75f09a20bb59a78a7fd8d020157017de2546d0710699d107
font_02_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 18596 bytes
SHA-256: 6ca6ef19e0f93cc98f7d6e9e332e0adceb84b8f283a0c6a741550ae4711c6d84

Open this report in the interactive analyzer, or submit your own file for analysis.