Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f7a41a7dd86138…

MALICIOUS

PDF

69.8 KB Created: 2021-03-18 09:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 61f884f54a41c33cb9032db1075ec208 SHA-1: 5995dc785d300fd692876934e85c8e9db4e25bcb SHA-256: 41f7a41a7dd86138f5b8b543bf20b2de2694a7dcb80e54d5466f1930c2bc2d4a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/123?utm_term=river+deep+mountain+high+glee+sheet+music PDF link annotation
    • http://jekeluxuto.mywebcommunity.org/how_can_population_density_affect_population_growth.pdfIn PDF document text
    • http://negisalipividul.iblogger.org/luvebiruxixatekesakefe.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/hbgdD2q/48300837526.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/brimstone_missile.pdfIn PDF document text
    • http://siruxovilojo.iblogger.org/how_to_determine_value_of_vintage_collectible_marbles.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ie2Libs/last_minute_hotel_bookings_london.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/melinipimopajovefogevuzex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dotimazuf.rf.gd/whirlpool_cabrio_platinum_washer_not_turning_on.pdfIn PDF document text
    • http://jedajokojar.epizy.com/economic_vocabulary_activity_chapter_8_crossword_answers.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_62d0f3008bcc4ffe996edc1ca94738a0.pdf?index=trueIn PDF document text
    • http://xipipowateselok.epizy.com/lagu_muse_black_holes_and_revelations.pdfIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_b219ab40966549c89c8b09dcff1fefbe.pdf?index=trueIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_81dfc98cea784139a27ac2fa5c51f5eb.pdf?index=trueIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_b45a1facb0cb4c4c97f55e3eaf0ec6e9.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_0dd0355ceb2b46bb9fad060ca2af5feb.pdf?index=trueIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_88ded0aaaed54c35b20506edfe852a38.pdf?index=trueIn PDF document text
    • http://jegovogetaferop.epizy.com/emma_jane_austen_ebook.pdfIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_70b9eb33f3274e9f9142c60407704685.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10E 5552 bytes
SHA-256: 22f2d1bc13c46f7211740ff17812bab46bf1f1df5ef93d0752786f1d6ea93c43
font_01_sfnt_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 11180 bytes
SHA-256: 792578b771e60d23cda0faf464331bc6a991bf447748f1747b8f6e899973eb0f

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