Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7896038cf4d01f…

MALICIOUS

PDF

106.1 KB Created: 2021-07-07 04:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a64336007b51258cbe68626b5e56c6ea SHA-1: db8db3a8d5ab6bae4d04ebd44015afa85e9c13d9 SHA-256: bf7896038cf4d01f2a2179d8845d3343bcd14d5ffc56f7a2b96f474c00f72ceb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fd8f70769b48a5277384a413446b8449/milizela.pdf In PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607da794340ea---vuxuragam.pdfIn PDF document text
    • http://ruresept.ru/files/file/82483434030.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e5566b6837d5ea8bbc29637e3102d0ee/63009192723.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd2424a263---9265486560.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089483cdebb3---xevewazumusikofugilalub.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/78619834297.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160892bdd2755b---kuxodoberodafoxuwup.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16071f2198bb4b---60579999633.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/vujexoxit.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/p94iq83kiurgr55jdjao9lk6rb/85320467759.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/84407867200.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8227e18665---69152863055.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7kvfsh7ok70jkbvak42mhb8c54/dafofetomeza.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ded8bbdd407---20044889661.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14b8fabe9a---buladezigogavezawivuf.pdfIn PDF document text
    • https://anfauglir.com/images/file/sakipurimojaf.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/83099932342.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/88902061886.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160878d2a285be---1682778572.pdfIn PDF document text
    • http://csss77.com/clients/d/df/df7f2fdc42e243c7a03c192a8228c0be/File/begesoradozokuvalofi.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b48b86f7a---89312664423.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a07c806f80---keremanomagidomaregamexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=statistics+and+probability+quarter+3+module+1+answer+keyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 17752 bytes
SHA-256: 78f567d986cb8188694b79886f9fb0e54d426469c73b235796258aa2a9f50385
font_01_sfnt_off00015df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF6 1624 bytes
SHA-256: 59142d9e3131d10ff105e67ae7a58fd8a3c70134eb981fd23033266bbf91d58a
font_02_sfnt_off000166ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC3 11652 bytes
SHA-256: 28788d253cc32671e248692f3c7b4f74f142b401ae6f4715d7df2e84c49045c5

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