Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4c66066c69d279…

MALICIOUS

PDF

112.9 KB Created: 2021-03-29 10:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2247679e5b57b1bc1bb6945b242e6c11 SHA-1: f90b63c163017257eec6a63c68efa5e78708549c SHA-256: cc4c66066c69d2790144777e78916ec2110d0104c303d9e2a1d9ad4f39c119f7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious content. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://nipisod.ru/award?keyword=orchestral+scores+pdf PDF link annotation
    • https://cdn.sqhk.co/mibazudifij/iibLie0/among_us_notes_online.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/7277593.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/i6ttg7K/28327733262.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/ChaghA3/art_history_masters_programs_online.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/gudexavibi_fakaf_kekor.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/555e4f4a1.pdfIn PDF document text
    • https://kavejujutafen.weebly.com/uploads/1/3/6/0/136022690/a05ac2eee580e.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/kegasade_josuw_movanigez.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/MRijJif/adidas_outlet_store_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/cQtOXD2/power_rangers_legacy_wars_codes_list.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/bih8cjc/gabogabewen.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/ggiaihY/robot_avengers_full_movie_in_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_670d2e47b7b14ebd950c5ae619e950fa.pdf?index=trueIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_545febe85d784dfe91910b2c8eb850a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/artaud_obras.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/food_dehydrator_meat_drying_times.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/65746603945.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/16279674168.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/50132827206.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/line_6_spider_2_headphones.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_87aaef606f294b4a8bae2e286180a2ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/what_does_the_rising_sun_mean_in_the_ffa_emblem.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_ab9bf1b9ff3f4be79bbbca14099e38ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lawakux/cricket_bat_sizes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/33389212620.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_off00017db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB9 5268 bytes
SHA-256: 3647d223d3c7a7dd914883bc9f4b1c280c994f75e33c63cb587bd0ad4ffea654
font_01_sfnt_off00018fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA1 11112 bytes
SHA-256: 6680d4841d8b188769a17e6bdf71b607d0ab2177d359b9e50fc15518e7348697

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