Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8f1993c37ac4f0…

MALICIOUS

PDF

105.9 KB Created: 2021-06-27 10:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e46afcd2f0ecaf92f86d5f04d6898bb7 SHA-1: d9fb5c51adbd08dccb8ac10c23ce8b74b69b0ccb SHA-256: 6b8f1993c37ac4f051bb091c639579c98ed45be836ea192ea1ccd715242ccb1b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is unreadable, but the presence of numerous URLs on compromised hosting services is a clear indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f9e3c308ccfb2e5bc0fbd40e5a74bf7c/4535831069.pdf In PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/q1jeomoq87s978j18r544p7091/31295257590.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050310180773499.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/84111253138.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/sdn2dq16ftec6rofqbpf3ulos3/juxowa.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/vagepevovuzuvajemavozewa.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c689327a3---wemazalozuxosexudufofirek.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/7b4a238790ead78e53da49e6771053f4/79061811147.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ad6791031b36343a3c2933ed34387dcc/1963127903.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795145acd8e---33804955931.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/3fbcf870315f48475c2c8594c9c30446/24459978907.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/kibobuzajot.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/858cdd95182caeb44daf09b1017aeb8d/56981783650.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/89968973840.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607991be7d78a---71039855026.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/958226f0d1c549b8d48e2cf0d82eab6c/66535923803.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/79726509159.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083c1f257b98---nilusakowuwizusaxamazezej.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7171b40f3---81581972560.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/2lpsa4np48ffpc4ie6vi7snd77/63030073139.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92ee4b74a---43406384738.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/5a4502b57a22c9169c972f9a46e6a26b/vesudazonunasepaj.pdfIn PDF document text
    • http://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/xikanujazaginoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=trance+meaning+in+englishPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f0e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF0E7 21532 bytes
SHA-256: 64253263b1b8bff6fc71be3f8daef1fb19080cc5e736456f2900e4543e739b50
font_01_sfnt_off0001169e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169E 25740 bytes
SHA-256: 97e78d053279e7ef79e447f2fcd22be72b54e84a055e3aba16b136abae9d9aef
font_02_sfnt_off000154bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD6 10424 bytes
SHA-256: cc99b4c647147223a9887959a78ce2a56dfd14e79f7efb2d5d93d028314da761
font_04_sfnt_off00018425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18425 5704 bytes
SHA-256: c313d9727e3013b22102e884e07bb7dc054f36ffeb220980219e27d448b42e44

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