Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1df50d5b58222a…

MALICIOUS

PDF

76.1 KB Created: 2021-06-28 20:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b39a94ee68143f23bfaaa869349766b5 SHA-1: 839e8ecbd1aaf5aad3f7dd4edb6cdfe1aa17d167 SHA-256: fe1df50d5b58222aa9a4099fb357382982388505ead2f84fb53761c3e4149457
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading a malicious PDF. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous distinct hosts and links suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceae9086bb---75806668734.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a417bc961---zozapita.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d582035c6---dupozisunagidi.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a453e15a6da---27032861466.pdf
    • http://beloezoloto.ru/userfiles/file/23227314850.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607368b89c4ed---taximoriv.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/528fae0fe3ed6e2545c7e4f177f1fc87/70572262781.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/4tjb2vgvlri35qmp4hphmdnja3/wuwutemimekopamerijudurax.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/a3705862030a033d819d0ecf223f7000/76590124904.pdf
    • http://hoaisonland.vn/upload/files/sigesiditejirepovonotomen.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac91398258---zalazolonejaguvowax.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a62ad8e21---dijaruvumuwofitare.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/tuxezenifewiguno.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/5a1aac74fef44b73b34968db7770f6f9/44006568040.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/2601dba34c6741d56094f70b525a9bdd/janopimedudaporog.pdf
    • http://nuitsdartistes.eu/images/file/77213046867.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0e536f6c9fb52e9cc068314f141456d3/zovijek.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160876aa6adbac---jivijawepon.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160908fa0213b9---88122226163.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27868c6b3---17859264417.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb32390b8b---jimel.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/65d7bfc0b4dede965de512aeee0d4cb9/14168571665.pdf
    • http://momsystem.ru/public/file/51736593111.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=guide+to+computer+forensics+and+investigations+6th+edition+answers
    • 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_off0000c10d.bin
2d8724bac541d3d6accc7d586d1aef13dd1596a40adc961c421230268ae1db13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC10D 11480 bytes
font_01_sfnt_off0000dbe8.bin
3c37f022784bc597d2f1f16af0e4961fa76c4cdb342e561a889738f5907ea69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 17048 bytes
font_02_sfnt_off00010897.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10897 16792 bytes

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