Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12c365f95744ef0…

MALICIOUS

PDF

85.6 KB Created: 2021-06-25 22:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f4df2b3bdf916d08e0f05ad11911c2e SHA-1: c6457fc82a089c63608555d8457c33908fac5c67 SHA-256: b12c365f95744ef07ea212d7121926bf852cb0f34799fa6a08b29b97c36246cf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The presence of numerous URLs, including those pointing to potentially malicious WordPress uploads, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/9e1076f824f4974c8911cda36fa1d8a1/sawimanujaruxawififunur.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d403797b7a---tixojonodowidarid.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cdcbc444f---jakexefawiribez.pdf
    • http://gtlmarinefuel.com/userfiles/file/27244711107.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877c0c29f47---50152753709.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/salv68qpa34sua1kcf1pmv8c92/xasizibijuwunowaf.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f733d509d---xonenunapisasofujarekel.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/18828ecb6b2c0b13255716d44bdbdbcc/nagoxipexowodatomeb.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a0bbf29b5e8807226175126b8b3fe3f3/77448489617.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/qnkqqept4s9720cfmeondejurc/zolaxazobuwuxutimadutonid.pdf
    • http://aj-logistics.com/stock/userfiles/file/65718104591.pdf
    • http://www.odnpoznan.pl/fotki/file/file/rofalakolatelodivog.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083457ecfbfc---kuvunuxuvav.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/41776151722.pdf
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/zozivomedovevuxomi.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c18a57979---9591549702.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c49288ad4---puwigi.pdf
    • http://thienlongadv.com/upload/files/vivodeziwuxu.pdf
    • https://eucolait.be/userfiles/files/69102728284.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b762785a8---papejagerilimalabalaje.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/uanof135va471nl33kru4qj1q7/62409670083.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e979f308a3---61537141919.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/cc1ebf48ebdf6ff37a61d5d4ea4c01cf/85960146393.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609acec587197---84263870025.pdf
    • http://skncn.com/u/files/numuxi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=isolate+y+calculator
    • 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_off0000ed88.bin
20ed4057a18b720a3804ca3da91e56fd46d821b3cf44dae4f1b7f5b9cfb07a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 17184 bytes
font_01_sfnt_off00011a41.bin
514f09bd6fb62a261d227566a3d6af9665b686407d1179073cb28aedffbcc798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A41 10192 bytes
font_02_sfnt_off00013156.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13156 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.