Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcde124372f5f63…

MALICIOUS

PDF

82.1 KB Created: 2021-03-11 07:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b4bb331e70d8738500b16f9905c0075c SHA-1: fc5a3eb47c7ccae5ce4c3e695266ee2616c15d66 SHA-256: abcde124372f5f637f01c7262c783c9c1377b19fb9c75d0ac7da2883615a62b3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=two+room+and+a+boom+pdf PDF link annotation
    • https://rasogumelix.weebly.com/uploads/1/3/5/4/135400304/kudiparen.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/5AjjifQ/16925013984.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/VjdpeNX/underworld_empire_boss_heist.pdfIn PDF document text
    • http://lightstart.xyz/buy_john_deere_ride_on_mower_australiaykkxm.pdfIn PDF document text
    • https://sufixekanol.weebly.com/uploads/1/3/4/7/134712322/joguwas.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/bujuk_kegorasudila_wejawuroxe_fifagob.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/igiR1gd/guess_the_song_music_quiz_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/gdjbFZP/star_traders_frontiers_ship_list.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/mazilebepelodik-burirojal-nomonuji.pdfIn PDF document text
    • http://ledimpress.biz/what_are_the_key_concepts_of_humanistic_theorygqxow.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/zesijupirobesow.pdfIn PDF document text
    • http://hushseo.online/duvusidobiduribujirs3b8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nigimul/wd_my_cloud_ex2_ultra_nas_drive_review.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/gulipaz.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_4f5f7e202d294cda815abee96fdf25fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/99015543733.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_6fb7723ffe0845189fc8459920dd2f2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/dasiwowo.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/100_egyptian_cotton_sheets_800_thread_count.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/dizelomotafipirirumogipiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/java_language_basic_concepts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 4700 bytes
SHA-256: 6998fd7e4f6fb95b8445629c8a4ddab509ecc870d1890f1476580843eca85a0b
font_01_sfnt_off000108f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 10416 bytes
SHA-256: e3203438f3fcc3e6ddfbf21f8e1bc2169760f4c5bdbbfae3d7661b8dd460a0e0
font_02_sfnt_off00012cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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