Malicious PDF — malware analysis report

Static analysis result for SHA-256 633397599305010a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-11 18:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2654faef049cf28b55e270c880e81891 SHA-1: 4c0e7735e38c3c2b692df984b49381745654843b SHA-256: 633397599305010a276ad65fbbaaa1590693a521c5010941a3c8b87e1756b250
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to external content, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=gta+vice+city+bangla+free+download+for+android PDF link annotation
    • http://assessmentinsight.com/ckfinder/userfiles/files/mifoz.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/tofinugilojavufo.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/nunubekavukaz.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/wulesave.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mavexi.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/tojipajivumuw.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/ef0fdccc8d9321c697f81ff5f95b165b/6382324664.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f620094e19---zukefomimixililulanezov.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f2msuk8am792o7q9t4kn5ndfv3/nadezurit.pdfIn PDF document text
    • https://ms01bet.com/contents/files/putikita.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/vufelutegekoxonulazo.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/fitowasewadi.pdfIn PDF document text
    • http://cecev.com/stockages/files/88742310365.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/50576803821.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/nefakogedikewaga.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210906215216.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4209b5d35---10680469988.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///nemogewutunikunolepasewu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/46159422421.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/92774892785.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/79848261474.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/gexupixigigid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE64 10928 bytes
SHA-256: b2e0a2e8f46d9a676349ef256ea9d5afba4ed8a56d7de36e2f5e284993b50767
font_01_sfnt_off0000c7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B4 1948 bytes
SHA-256: b033f7fcbcd390b2cb396fbb5f03ef01f7ca9afc151f9d9df21604321f961cfa
font_02_sfnt_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 14384 bytes
SHA-256: 7e23776fd0d3912f51d868de3f9b8190a97327bcb2b11950c390c79caf22b649
font_03_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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