Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadb49749132ce0b…

MALICIOUS

PDF

80.0 KB Created: 2021-06-24 22:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7ba65bdf2558dc9aac3da4a9c27513c SHA-1: d0df3b02a7d86a1b1c81212487c6128d4b8ce99b SHA-256: dadb49749132ce0bd7147282f584ecc6d52f89d0d7f7af88e5a81c962a70faff
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, directing users to various websites that appear to host malicious files, disguised as legitimate downloads like drivers. The URLs suggest a tactic of SEO poisoning to attract victims searching for specific software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8211

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.
  • 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
  • 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://chcial.ru/uplcv?utm_term=canoscan+lide+100+driver+for+windows+7+32+bit+free+download
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/bnti8egcnv4fkg01kei0qtqeup/51867787774.pdf
    • http://kursadowicz.pl/Upload/file/8261478516.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609079433a962---44330205226.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a8579d45---vebigi.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/k10vl6t5k83gpn1en23a9rj2kt/38184931818.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa9b5503c5---nuketanotuniki.pdf
    • http://esistore.be/userfiles/file/kamapufotoredadumet.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087b847e6dd7---lekivem.pdf
    • https://securitydm.rs/slicice/file/98814048483.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/3c8764cd4b6a160a9dc40bbc2265c19b/sojukilezev.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607013531ba3a---23673172853.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ogvnbgkha67r5373tmfh1hm9k1/desixosafek.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4ce6a8be1---93859350626.pdf
    • https://stijsr.com/userfiles/file/53863707431.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf75fca87e9---votusuzeruwoserifanoxonot.pdf
    • http://younewstoday.com/task/userimages/file/favejuvibotatekasixazuzil.pdf
    • http://wojno-stal.pl/pliki/file/dosexojajinonati.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128a8.bin
e80539876068d780ac7a1ee92f249e56d739a320ee3a1191d0ad46b37c31f5f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A8 4596 bytes

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