Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6280816d31bec8…

MALICIOUS

PDF

83.0 KB Created: 2021-09-16 15:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 82791e3b9194d1b9356d59ec0e556901 SHA-1: 751f843207ce0e487c967c761cbb6fdc15b50387 SHA-256: ea6280816d31bec82bee8aaaefeaf55ea54484c071d8af171215202aeb9f766a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'download button' heuristic further supports a social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c7bbd593547d0be92966dba8677d9aba/507186365.pdf In PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2807bbdf2---80648890860.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/74276039953.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/48261475221.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142573b77fdd---pufegaxajefogewe.pdfIn PDF document text
    • http://csp.hu/editor_up/sepelelopitopijasubos.pdfIn PDF document text
    • http://pasaru.com/upload/files/60730742984.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/sugivotimovonurakipaz.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/54900341853.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/3quluvoitrb1d19fjttd9b9g14/bakebubiketizudibuk.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/26139468953.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/mawupiriruzafur.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140b3305135e---49664333480.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16131aefb48115---gukorolexoled.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210902151654.pdfIn PDF document text
    • http://askort.pl/Upload/file/90141787071.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/zudoxarubazozilux.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/56500927614.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/timajiwinalabe.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f95e82c25---zudikenamojut.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/pibiba.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/fovonolelikukijavujigi.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/dumososaniwit.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2b33e87b6---80567594786.pdfIn PDF document text
    • https://euforbiabulgaria.gbinvest.net/uploads/pages/files/worakax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=download+pokemon+mega+fire+red+gbaPDF 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_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 10896 bytes
SHA-256: 42a4c2ba0d5230fcc5ce5717a7064e5be82d12b3625030b885e93c7621a3b81f
font_01_sfnt_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E51 18336 bytes
SHA-256: b48c7af59b4ef950a30eb5216626e397a975b18e98d7832e9a285321a3fe0bea