Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c207194503e9e81…

MALICIOUS

PDF

87.2 KB Created: 2021-07-07 20:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f82a1e2aa008e751f65e2a6ac188b5df SHA-1: 11dccf950b0197d83fc7891b6a637d849672c171 SHA-256: 7c207194503e9e819415107a111c57e6b10c6f4e0bbd3180780349e3f354c9a8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high number of external links, many pointing to compromised WordPress sites, indicating a likely phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to lure users to malicious content, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3719a8e367---67118142158.pdf
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/83114216490.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/785ef54136e25dedc08303118892d041/tidezibu.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c73627b6be8---paxulagemopokelexedugani.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/76d3246bf92856d5c5e9f4b9634afdca/xabimowezosividud.pdf
    • http://huerural.com/uploads/image/files/72419498166.pdf
    • http://velo.hu/UserFiles//file/65810677137.pdf
    • http://beauti-full.ru/uploads/files/gikug.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/9aq2stroidha78vp6g72gutvca/67009984495.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608440230c9e2---56666736645.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733037db225---kugeganizo.pdf
    • https://artasedanasingaraja.com/uploadfck/file/61329161935.pdf
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/2677205891.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b25aea77---modewa.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076242c3cd05---ruradofonap.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/djc86lov6ri0l6ukk9jliijfk6/47240136157.pdf
    • http://pescepiana.eu/userfiles/files/44415869872.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16f9ee2320---22865785378.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814b1aefd3c---61208955842.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/gf1bigi1vg5c7h65fg5gql2om3/36764994096.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/b55efa44db30ca1f4e74bb0319ddaf63/65436855315.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/4g8u4flcbso44dj61hd8vmtip1/8891012175.pdf
    • http://micronforgacsolo.hu/UserFiles/file/39349228440.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=what+are+4+things+plants+need+to+survive
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1dd.bin
c3cc0c951335f3c4ac3edc2b2265f010b1229a191f0482178a8ac50c4c962443
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 10908 bytes
font_01_sfnt_off00010ae8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 16792 bytes
font_02_sfnt_off000122fa.bin
4a99732e92e8551b7baeb0cd692b471a836e5935e03d74a472aefd1c2237659e
pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 17148 bytes