Malicious PDF — malware analysis report

Static analysis result for SHA-256 07074b84ddd16bc3…

MALICIOUS

PDF

95.1 KB Created: 2021-08-12 19:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1cd953c3f8836e9bd6ca55f9cb53c526 SHA-1: d0a27c289304460a38296cb1ea91fe12fbbf4ff2 SHA-256: 07074b84ddd16bc3aabed845d5980bcf8c5f3e1fbb803d7fc4611283b4e6edfe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on compromised WordPress sites, directing users to download other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of multiple external links and the 'link farm' heuristic suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=hollywood+movies+tamil+dubbed+full+movie+hd PDF link annotation
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c25265f6---pirekin.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/14605215853.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/12517834872.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b143de2bd---lumigo.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/36370504413.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9aba35eb64---revafejokosanuxojifos.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c99dc60455e---noxevimag.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/32530134245.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb484581c3---gokagep.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/7ebec1d8d84a99f75337a29c643ad67f/44235968510.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba983580ad2---xorobimonurazedotefilu.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608894aa4cb69---rarad.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/lebovu.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210619020002133094cbi03ogmsbgk.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/gepetififugexamobigixajom.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebbcb6e338---venotirukewukalinebikugu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608498655806d---20725373134.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/2267986193.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/sefefekozos.pdfIn PDF document text
    • https://actor-conseil.com/files/file/65494813974.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/dumudisobagek.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f57f68fa2209e94f2df9e09f21cf09b4/lopetexe.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/33131731690.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/vilimewekurotavifamibu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 17020 bytes
SHA-256: 33bb9406f074087276f115d098facf768b3f6ea977e7c5054771ad7ac7400c50
font_02_sfnt_off00013e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E40 10912 bytes
SHA-256: fa0a7b02fdbc3f13f63db4a187d3fa67847dd5dcad90ee98036d8958fa8d51a2
font_03_sfnt_off0001578c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1578C 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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