Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c960ae29dff64e6…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 09:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: da71898f8d5c200b2b927c18318dd7dd SHA-1: dd4549f7a5e3b0de68007f020422183b5253ad90 SHA-256: 9c960ae29dff64e6657267f74e5654b9848f49de2775a12afb209fdc9c3c92fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It functions as a link farm, directing users to external URLs, several of which are hosted on compromised WordPress sites. The presence of numerous links and the use of compromised hosting suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://isitekmuhendislik.com/userfiles/file/penabokuvoxaba.pdf In PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/l81u51a8rn62qlma5f1fiut0fl/muzekinudafapineso.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612598ff8af48---rikixapevuzowul.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/10191639187.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/powezazimukulakawosipoz.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-24/20210624044934789664.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/gefurivorafoxoverugu.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/lipupowitalupitoredon.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/15691379299.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/46463164012.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/daripigevip.pdfIn PDF document text
    • http://dade666.com/userfiles/202108file/2021080114325270554.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d62576caba1---durozokoboligiludatase.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/0i35q7t423q2a9s2rg4qkq58fh/31680919375.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/9ff19b152ed0ceaec38327b9dfa436ca/75070644560.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/kedugutetuguman.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612198c0d9613---jixovebovinimo.pdfIn PDF document text
    • https://maisonforville.be/documents/file/sipobomijopurodut.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/pufusegiwodamazotabavir.pdfIn PDF document text
    • http://solac.nl/app/webroot/files/userfiles/files/xavoj.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/40540942544.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/danubukeboxuke.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160777a0c36791---91244159512.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=affairscloud+pdf+september+2019PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 18112 bytes
SHA-256: 0832802858a460b038c7928e3a8fa1587be172e2bf5f6b8cd39cc4190a109be4
font_01_sfnt_off000110e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E0 11360 bytes
SHA-256: 09904f5d69153296455c99802e39dd98ddb3e522b151121c89881ede5ae2a360
font_02_sfnt_off00012b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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