Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f5206c59a0cfcb…

MALICIOUS

PDF

83.5 KB Created: 2021-09-03 20:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cf75a7b8fafe2742eb26a75b508c2fbe SHA-1: 14c5968b222b39b5b96b0289494d59312332ab8c SHA-256: 45f5206c59a0cfcbca1e129ddeae6c2f3bc974860e14d0fca73a2e40bfa96427
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting domains. These links likely lead to phishing pages or further malware downloads, consistent with 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 http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a16827ddb1---xuzemexolilut.pdf In PDF document text
    • http://jinshi66.com/uploadfiles/files/16274249640.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/003134e7d136eaf0cdf16e5b3a49a1f9/59698447305.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/fanidigumawudiwuk.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/60qv5ar3khj6nstdimilgmskh5/5020376934.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610467cc5d5b1---zovogivujixegafibos.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0d8f2bbd097b7472fca6503c5448b90b/lowepoz.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076e11228947---5416739687.pdfIn PDF document text
    • http://yuha.be/_files/file/94762221464.pdfIn PDF document text
    • http://herve-coiffure.ci/files/45036373153.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/lavefajizexoxuwekawafumux.pdfIn PDF document text
    • https://eklyps.net/images/file/vagasuwoditevozedoxozip.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210608_5A9376B7BE066837.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/qhccso82r4s6eaemg2fm6gh3tj/51490618444.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/bb2e3993a4d4d4af746dd9e0d09a2e01/tukemojabow.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/jixojupexidudujusavotaxun.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79924196522.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/retoxeliburudezufomosexaj.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/winoxuzanudaxoxefaver.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/36619776927.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/58880865790.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/60014290135.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/3b6d38f76afa25457c3eb7bbcbe141fa/68043827511.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/77754692606.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/0027b90822f73f5f2396b8ccaa4dd875/89107521440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=teaching+for+conceptual+understanding+in+science+pdfPDF 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_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 10960 bytes
SHA-256: 301c7100b9aa1b34a308b92d8471500251db20237734b1b6b64e3e5c1600938d
font_01_sfnt_off0000f939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF939 17764 bytes
SHA-256: 73b181044ce9e5ffc61942c9f3c3bee9cbbab8d81d02abd4476aed0ec303e048
font_02_sfnt_off000127c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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