Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff01702105771ec0…

MALICIOUS

PDF

77.0 KB Created: 2021-09-30 20:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f609673cd4b2eaf9672402a095a5b0da SHA-1: db95d74456f9bada752b8e19893e4f3d40de290f SHA-256: ff01702105771ec0bcd7bc8407faccfd053af1c18c2b2bd515ddb76e92aa85b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs that lead to external sites, some of which are hosted on compromised WordPress installations. While no scripts were explicitly extracted, the nature of PDF link farms often involves JavaScript to facilitate redirection or exploit vulnerabilities, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://poltinik.ru/userfiles/file/kesabesigewuninufitaw.pdf In PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/51000982253.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/xaxolufurixojatufuzewup.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/babupam.pdfIn PDF document text
    • http://vititanon.com/user_img/files/fibusudadenawigesuw.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613165d7974ca---28813653713.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca487c6555---84136806681.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/17169867911.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-29/20210929131423293119.pdfIn PDF document text
    • http://sdes.in/uploads/20032805822.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/33034561650.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/92315293423.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/lawoxuxi.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/jezazovega.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/e9b1c39cc6241dcae2efbd70558d700d/17514198442.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/53160937350.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615017adee2bb---xusimulesajaborikew.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161492ee7c3dee---27918789034.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/38523731206.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/17291665451.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/2492492515.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/39622603480.pdfIn PDF document text
    • https://reniuved.it/file/togimoziwuxagibiraw.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/vubisug.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/duxibani.pdfIn PDF document text
    • https://ottopianos.nl/files/gomediguwuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mi+mix+2+miui+11PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FB 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_01_sfnt_off0000ccd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 17260 bytes
SHA-256: 0d18bb77f605619728d14f6bf71fc778b22429c975e6dc909f2080d1b66ba033
font_03_sfnt_off000110df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DF 9704 bytes
SHA-256: 4967eb28dee602cf7d069a407a635ccb7b42641aafddda1b93941f8c0cb582b6

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