Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5908a502be2095…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 19:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68632ce82c6e2368b16d872664c2f7f4 SHA-1: b3e84b97c4d0733ec3173c9f3e93f0470a80073a SHA-256: 3a5908a502be20951ee644bc209f64cb457db8baa2cf8181fa10e3be5591389e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://philabc.ru/uplcv?utm_term=serengeti+rules+pdf PDF link annotation
    • https://photojet.net/userfiles/file/67940887970.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/olrvprj5veg3jinqdurmt9l0g6/74622772904.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f930bda620a---4043950379.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5502964ae---39831810483.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160960adc1dde0---xetivitunipoxajedevig.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/xasubalojolufegifeji.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/44715134688.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161116b9140e7c---zomesilavuvawojikiki.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/12731768895.pdfIn PDF document text
    • http://zaiger.ru/img/file/76926626840.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3a65794d---6342849077.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e6d497300---68699301160.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/63094305340.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/didoseroza.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/ginowudogazut.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c41595ec4ea---gakuxuzukarefabanumumu.pdfIn PDF document text
    • https://parkettworld.com/upload/files/66838178918.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/safataloxegapax.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/12126655750.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/97746937451.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ef1098ecf---sejumetemobujopuzusexusel.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/popasenazavak.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/xalodufu.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/fufigovalul.pdfIn PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/vesuvazukiboxiwawa.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_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 17432 bytes
SHA-256: 33dd6fb65c88a510156105dfc733a947d49c1b8f40c2d985d91354c7ea8cfd16
font_01_sfnt_off0001148f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA6 10564 bytes
SHA-256: 4e9adb371a382a851c4da43b2c27ef83563caecfa001552779af6908b990b182

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