Malicious PDF — malware analysis report

Static analysis result for SHA-256 952ed04b2c17fe43…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 19:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f2c9c6d95fb00b36f6a9b0e2847cac85 SHA-1: 97d4d8dff75a19c7ab8cf983413af65f88adaf2f SHA-256: 952ed04b2c17fe43ef32a10df60343a0cbe65d7884631bc7d99aab125b78a5cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://floral-design-lindgens.de/userfiles/file/murafojubobulazudirewirax.pdf In PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/98331125322.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2114ed269409ec80ba4847fbdca778a7/52657502390.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/siluwizogevojo.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/sesawexuxaxajegusonixofup.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/33311508253.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/35483718850.pdfIn PDF document text
    • https://bursac.net/userfiles/file/kepifa.pdfIn PDF document text
    • http://progetec.org/userfiles/files/25286486567.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/wudigopi.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a075916413c---84585128664.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/zadegasobewelajawaved.pdfIn PDF document text
    • https://blv.by/upload/editor/files/xosanoruzerun.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc32ef35009---39646863584.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/303b04446a70cfeb289c0d57b33985de/fugatuzozujokagiw.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9e6c2ada489abc82a43fe5d8bc8a84c9/53407777277.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/96ad98b38d4f091fa5fb4c047d5786f4/38379100504.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16077cc49c826f---9971210549.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/39e97e4aab034bed7d4d1c421b1cbb25/91304935648.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/52459617514.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/46981272596.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/fphek972gimt7h8c5h8drbugjv/zelirajugejajuluvejuti.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/56161443203.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b6ecac79b---supozujepolumidamafojod.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/dakudonili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=zamzar.com+-+zamzar.com%2Fconvert%2Fmsg-to-pdf%2FPDF 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_off0000d454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 16736 bytes
SHA-256: 1d7a655ff75700e9f9894ed8e576061df0576baee1171da9ebbf5a780f531203
font_01_sfnt_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 11048 bytes
SHA-256: ad198ab6b3f9c8bd2a3cdf0c42bffd83c9ecf03b2a3bc9016a6caca3eb470c1e
font_02_sfnt_off00011942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11942 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1