Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd88a6ea6347e903…

MALICIOUS

PDF

251.5 KB Created: 2021-07-05 12:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d36186ef2a108b5acf0ae59fe20c44ac SHA-1: b02217e5e93f1141ab9260450cb78738ec5d59f7 SHA-256: fd88a6ea6347e9038f3cecc2744de4330390adf32ff74c811131cc8c1d6be45e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links pointing to compromised WordPress upload directories indicates a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9799

Heuristics 5

  • 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.
  • 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.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/rblr08idn2knvpq94jnmrhers7/fusurolusipiziwuj.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/416f2b652b7f20c05a6b7391bd8f183a/58594462410.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2d0eor80el4efkfbkd3sjbkn25/bejavu.pdf
    • https://datajournonepal.org/files/dokolozezitizegoluzo.pdf
    • https://vmwarts.com/ecovic/file/viletesorojaxaj.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/dgt1kacfpunduqgvefnmfl9nn9/tiwegigub.pdf
    • http://abwcrainhwy.com/uploads/files/72989987517.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/aa36e1e26b565ee250d1a6bfdd5b890f/vowurevugagivux.pdf
    • https://energooptima.hu/upload/File/lexavipepegutab.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ee8dc0c78---jonokaxat.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c04154f2a3---nomopefodib.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607a89f3d9bb1---37713989903.pdf
    • http://minipit.com/data/files/86699771041.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7849c51867---pumirerubogadubum.pdf
    • https://estoniapools.com/contents//files/31138449435.pdf
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/887f37a2e6165ef4ee4a4a83df67623c/teregukotesaj.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098c592c5a13---lejaramegababunowebomali.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30923c14e---23558314749.pdf
    • http://www.contectrade.hu/fckfiles/file/bepapapituziwolezakizaz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=shabbos+candle+lighting+times
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00035c42.bin
24f258a50ee4df19655f07b5ef332dd2a2ee244a2e75934eadfab67cb6dc7843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35C42 19600 bytes
font_01_sfnt_off00037dfa.bin
789aa70d34dbcc85aec75fdf82139a50b3c0496be77408f3f8a886c1d2c8d150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37DFA 10932 bytes
font_02_sfnt_off000396df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x396DF 16792 bytes
font_03_sfnt_off0003aef1.bin
c8fea5b22d3067b1fa04bd2231e6438662b2e93413615984facd1effe44140d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3AEF1 18048 bytes

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