Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d6b8d3dd5f7f4d…

MALICIOUS

PDF

81.4 KB Created: 2021-03-23 15:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51bb7d5f0a42d104bf8b555972694d56 SHA-1: 77bb55238a9007cc2ebc062d71d004d8f03822fa SHA-256: c7d6b8d3dd5f7f4d251394dd845b71e8873960a96ff6048627781b116cff03cc
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting. The document body, though heavily obfuscated, appears to contain text related to product manuals and games, likely serving as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=presto+02141+6-quart+electric+pressure+cooker+manual In PDF document text
    • http://trokot-tonirovka.online/uno_card_game_for_mobileceaci.pdfIn PDF document text
    • http://rankingcoach-seo.com/33212908454dlfx6.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/hiuhhhd/slots_free_play.pdfIn PDF document text
    • http://cyberlife.store/kaloxofxltk.pdfIn PDF document text
    • http://it50save.info/afunika_latest_songs_2018f4lyh.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/cihRbii/63073161622.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/hjifijZ/40371337072.pdfIn PDF document text
    • http://stroymarketmetal.ru/how_to_clean_new_construction_hardwood_floorswew8v.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/Gfgjjco/words_that_start_with_h_funny.pdfIn PDF document text
    • http://dressnbuy.com/loderijikewodiweg0vrvl.pdfIn PDF document text
    • http://tells.fun/38952788166qkt0h.pdfIn PDF document text
    • http://tekplafond.xyz/format_factory_setup_32_bitueqlv.pdfIn PDF document text
    • http://maska-respirator.shop/judatumorunodaat9uj.pdfIn PDF document text
    • http://xtina.online/31487005737gnfz8.pdfIn PDF document text
    • http://uscarins.info/tying_knots_in_thick_rope4uzvj.pdfIn PDF document text
    • http://on24-system.club/42195042362kad9p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_52aafa2aa1a24bc0ae1b77a32642baef.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_47902fa802f84a569d2ba200e932c1ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32e2948-7b88-4275-8086-a1d4d1a1889c/sefijomaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476eb653-ccb7-41a4-8329-466c1b527f1f/40162874931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6571676f-e3ff-4c29-99eb-c77b2de5c964/model_3_long_range_performance_update.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_23d9f21bd4034736a8033439da25c263.pdf?index=trueIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_d82bbd38fe204608afa84770e6acd9db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87497595-dc71-4aa7-9955-3af25a1ecbf9/eragon_movie_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a93671-ca05-4c8b-a293-fd44129e8faa/but_how_do_it_know_book_review.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_off0000fe3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3E 5868 bytes
SHA-256: 326ebe6fdb11ffc7651cdd5c20aad3bc646fd0b10dca47e61bcf2fea614b6cf9
font_01_sfnt_off00011240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 11020 bytes
SHA-256: 742ae067731f95e611c268e66e8158e309ee291608e202af5d49388b51d2b8b7