Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c80dd1c875d4f4…

MALICIOUS

PDF

75.5 KB Created: 2021-04-04 13:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f8d8eee0e3a1b320f71355cf4e6033b SHA-1: 282c9d543da76fdf6480d8c94fc556afcc6bf55e SHA-256: 89c80dd1c875d4f4e80024429fad74343ddc0bab30deaf245cd471942299fe00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=choices+stories+you+play+mod+apk+2.6.4
    • https://cdn-cms.f-static.net/uploads/4404727/normal_6038e8aff1981.pdf
    • https://cdn-cms.f-static.net/uploads/4464700/normal_5fd6e5d0bb950.pdf
    • https://cdn-cms.f-static.net/uploads/4372100/normal_602c0e5224159.pdf
    • http://negozio50sconto.info/slide_for_ppt_freel5w3v.pdf
    • https://cdn.sqhk.co/tilafukefuwe/ibe8gcl/the_rotten_aftermath_rescue_the_survivors.pdf
    • http://smallita.space/aprendizajes_clave_sexto_gradov372c.pdf
    • http://arfeshome.com/how_do_i_fix_my_kitchenaid_refrigerator_that_is_not_cooling2w6se.pdf
    • http://trikolor.site/ratoxadelagawukiorwox.pdf
    • https://cdn-cms.f-static.net/uploads/4380229/normal_603dcba6062ce.pdf
    • http://summ-green.fun/392761372907wczj.pdf
    • http://kinoogf.space/how_to_lose_belly_fat_indian_diet0o6yo.pdf
    • https://cdn.sqhk.co/zebenane/ichahfU/fish_tank_for_sale_philippines.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_f93a12897fc74129abfac262a211636a.pdf?index=true
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_c1cb9b08578b404592ab0df2625fdfa9.pdf?index=true
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_e5cb8bfd53b04928aea6881603f0fe86.pdf?index=true
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_eec38506f6d24e5192514bcf7d72b0b5.pdf?index=true
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_9e44bae8aecc4c6eab5841c990c477ed.pdf?index=true
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_509eba2507e948fba6343326aaf02943.pdf?index=true
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_05c0405d999e44558f3de6d48ff50d88.pdf?index=true
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_d750c0ef39bf484bb8f1f62b882d5490.pdf?index=true
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_8ab57aac199c4d6abf30760fd6f71eb7.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec3.bin
aac606b79f8c917e148422e211d4245ee0649b18ce62ce8b508890216e30d61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 5792 bytes
font_01_sfnt_off0000f25d.bin
347f4f78275cdda19a14c8e84b147226819a89849b1ee1d06a602a4344af7368		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 14008 bytes

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