Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20cc1b8309d3bf0…

MALICIOUS

PDF

72.5 KB Created: 2021-04-03 14:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 02fa64115d0b324d5bfc6728f1162e8b SHA-1: 9de4014d045bb3cbc281a729a1375418461d9b6e SHA-256: f20cc1b8309d3bf09653cf719e9f19002b3d49ce96b19fbef6acbdd8dbb68b54
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 0.9997

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
  • 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://mezovuduw.ru/wix?keyword=como+hacer+un+album PDF link annotation
    • http://help-copyrightviolationhelpcenter.com/how_to_fix_air_compressor_in_car6uuef.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/60225079786.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/74225210291.pdfIn PDF document text
    • http://mikrotikwizard.com/44032510812y383i.pdfIn PDF document text
    • http://busforpay.online/wegapelaxomisudulbflk.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/nonparametric_statistical_methods_using_r.pdfIn PDF document text
    • http://autoupgrade.website/i2c_lcd1602_datasheetfxl64.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/85176159077.pdfIn PDF document text
    • http://kewotij.mypressonline.com/56604881715.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/sodimopugasarupezezixalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_2b49409217a94685a4d5bad09f4d8b05.pdf?index=trueIn PDF document text
    • http://namakanexir.atwebpages.com/truman_capote_a_christmas_memory_audio.pdfIn PDF document text
    • http://junaken.onlinewebshop.net/pathogenesis_of_hiv_virus.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_f6c89ef94a8849da822f08fe87b27482.pdf?index=trueIn PDF document text
    • http://fowimifefezujo.myartsonline.com/best_calorie_counter_app_uk.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_2bdb86cb4b51424ba60a36d709be0b89.pdf?index=trueIn PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_71bbc427e946455285fbeda4949080d4.pdf?index=trueIn PDF document text
    • http://jelomasulavi.atwebpages.com/amharic_music_lyrics.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_ac8eec82584e4a88b965a23e38bb6af4.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_382629f02b914aa6a1caf6425f3f6751.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_785bfaba7b8c44448e912352755d574a.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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 4908 bytes
SHA-256: 7635af3edcebd0e4f10bfad6ecc53b055f31bbbdfeced5cee4ccad3d3a153ed8
font_01_sfnt_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 11232 bytes
SHA-256: 1d2b061a23bc837e38dd229b0b43771a6bc15dfad30d30d033df0dd487e93dfc

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