Malicious PDF — malware analysis report

Static analysis result for SHA-256 0365801fb5961632…

MALICIOUS

PDF

73.9 KB Created: 2021-09-14 06:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a64c65bd3da12bce606b77e0cd46af62 SHA-1: 266b28b291819d1b312bd953882c2f3e95178005 SHA-256: 0365801fb596163290615521e665d74393029f6c45631ca110cd60af4fad24d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous external URIs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using such domains for malicious purposes. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://safarekhoob.ir/basefile/safarekhoobir/files/fifete.pdf In PDF document text
    • http://domplus.su/userfiles/files/59330428557.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/fesitux.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/26703671598.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/26422626027.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/90956422111.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gijekuretalajavifurikil.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/70134723274.pdfIn PDF document text
    • https://paramourpourbebe.bettygagne.ca/userfiles/file/somoxisuxurasebuzusavodot.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/bazezemijasukurifodanut.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/vubawumitoresufuf.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ofvvmu69d0gbj8pu9fhqd46rv4/numozal.pdfIn PDF document text
    • https://podimercrm.com/img/files/27092995731.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/52433961846.pdfIn PDF document text
    • http://ifap.it/images/file/11414396956.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/mamixafabolegusov.pdfIn PDF document text
    • http://protok.pro/upload/files/3757530847.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/tegosob.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/8291158561.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/52579292197.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/moxedonagazokufogulisit.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/06810ec527815e00657547d2804a24dc/61132714333.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/46439339770.pdfIn PDF document text
    • https://asi-filter.pl/files/file/kumijirep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=open+camera+android+appPDF 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_off0000bcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC8 10388 bytes
SHA-256: 544e80e30368bd015cbe670ef52fd85b742dfd7a6f25b35ff3e365fafba45172
font_01_sfnt_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 17816 bytes
SHA-256: 2ae187adec885af12682f8488e1eb42d095bd97d06f379815105d136796a18fa
font_02_sfnt_off0001021b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1