Malicious PDF — malware analysis report

Static analysis result for SHA-256 c677aec62230fcce…

MALICIOUS

PDF

97.4 KB Created: 2021-03-09 19:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1386fa2ce0e631446ed1515bf19ecc10 SHA-1: 218ec6cbcb1103bc6f298a1a391acd60bd8ce35f SHA-256: c677aec62230fcceeef4c536064d6b7b5da3886ef99b5ffbf84440179141e55c
126 Risk Score

Malware Insights

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

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 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
  • 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://leonvi.ru/123?utm_term=dayz+launcher++slow PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/jo2SAge/spider_farm_crusher.pdfIn PDF document text
    • http://ludshop.xyz/grand_stickman_rope_hero_adventure_mapsuxw7d.pdfIn PDF document text
    • http://design-kvartira.info/jitenerusowijaximinofns.pdfIn PDF document text
    • http://smartycredit.info/percy_jackson_becomes_a_god_of_time_fanfiction_pertemisua7yh.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/line_6_spider_3_150_watt_review.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/nextbook_flexx_10_audio_driver.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/a06hjid/seremev.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/gcLNQjc/lebevapetagotubawefometi.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/how_to_score_wiat_iii_essay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toloruware.rf.gd/hd_3d_wallpapers_for_android_tablet.pdfIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_ae90ebf75d1042b1841c19f7deb30f05.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_96932993a8904de58b121b215461eb00.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_e8a6a391e126448da7f01fd54852ff1b.pdf?index=trueIn PDF document text
    • http://gamutazuzores.epizy.com/gopeduki.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/granny_smith_apk_revdl.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_2a6ca67facda4bfc96f371498eaf836a.pdf?index=trueIn PDF document text
    • http://sugexure.rf.gd/butterfly_sitting_on_flower_images.pdfIn PDF document text
    • http://tidefos.epizy.com/is_there_a_8th_harry_potter_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/34639050676.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/sportdog_shock_collar_replacement.pdfIn 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_off00013d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D36 5128 bytes
SHA-256: dfa8ec49cb93ab49d59adbee1e4e29dcffb0aaa410584a7e270d6f4f6d6bfd42
font_01_sfnt_off00014ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC4 12588 bytes
SHA-256: 0da60214312e41b68512aca0206fc10f3803ea36ff70830829f97fcebab19c66

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