Malicious PDF — malware analysis report

Static analysis result for SHA-256 468cdc710208cc52…

MALICIOUS

PDF

86.5 KB Created: 2021-06-27 05:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd73f46b6665ef0ba002096f6cc65544 SHA-1: 542710398ecfeaf8cec2bf53f069c4883f1aa5f6 SHA-256: 468cdc710208cc527e4392cd861ef8f01cdba846d7d8d9cff7af16f26d13581c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive link farm suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc1c785c5---mafitipulodidemakodidafi.pdf
    • https://egyptsuntours.com/userfiles/files/farazimokebironemuvibit.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb971d475---matito.pdf
    • https://catbasailing.com/upload/fck/file/8140158844.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e69cfb3de1---36817443288.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/7513c5420d5d22c2672ee1b9ba39feeb/falesasebipulawesegalo.pdf
    • http://canvangdientu.com/images/file/93269561050.pdf
    • http://weberstellen.ch/userfiles/file/60233992553.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715fb53e38a---suzifabafefivojezenaro.pdf
    • http://grupopiscis.com/upload/files/fazopexuforalo.pdf
    • http://podiummoda.ru/userfiles/file/30044271825.pdf
    • http://industrialdevices.in/uploads/83189262040.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/4d9d20b803add0a5aecb87be147b0081/raxudibizojoweripa.pdf
    • https://atl-50.com/files/file/59225952820.pdf
    • http://malbreil.com/userfiles/file/81292855021.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948210657ee---37565516072.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a261f57626f---20564370505.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/rotuveletis.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3d0dd603ad98182b2567dcb308918eff/takobosobevivavitin.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/79551e77f819d9320026162de774d479/64703118324.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/304a9440aca29f5dedd855cea512ea5b/33951117313.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=integumentary+system+of+the+body
    • 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_off0000ef1b.bin
bd487baf542ee3367d72b2984467a8326dfffd91c80f5f982991b9cf05302d00
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 17016 bytes
font_01_sfnt_off00011bb1.bin
a130b46fca8684400dddd7c4d353111cb7bffd80018975a6e77f24bf010fa782
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB1 10968 bytes
font_02_sfnt_off000134cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134CB 16792 bytes