Malicious PDF — malware analysis report

Static analysis result for SHA-256 e129deb0623622e3…

MALICIOUS

PDF

95.7 KB Created: 2021-01-18 02:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7b08d04a2ec73172f56114600922ff56 SHA-1: f8e579ddef5c808330e19236fc5022ad3028b489 SHA-256: e129deb0623622e31be9b1186d099cdb79040296252dfde5fc97eb022bc8f9fd
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 point to other PDF files, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/wb?keyword=capitalism%20and%20socialism%20debate PDF link annotation
    • https://site-1249680.mozfiles.com/files/1249680/windows_10_size_media_creation_tool.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/4872762.pdfIn PDF document text
    • https://site-1177018.mozfiles.com/files/1177018/water_shooting_arcade_game_app.pdfIn PDF document text
    • https://kulisofupelami.weebly.com/uploads/1/3/4/3/134354285/natisogefesom.pdfIn PDF document text
    • https://site-1174796.mozfiles.com/files/1174796/sokorarudanipab.pdfIn PDF document text
    • https://site-1175189.mozfiles.com/files/1175189/bollywood_movies_hd_posters_free.pdfIn PDF document text
    • https://site-1168131.mozfiles.com/files/1168131/agnathavasi_telugu_movie_jio_rockers.pdfIn PDF document text
    • https://pakowojazawari.weebly.com/uploads/1/3/0/7/130775116/lilokot_selutumi.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/wazotojemov/48733143912.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/all_in_one_runtimes_english.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/98300711045.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/kepikupujaxav.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/best_buyer_persona_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/feralebadivuxatale.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/gogutidawipo.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/realvnc_ultra_hd_video_driver.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_off00012d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D38 5076 bytes
SHA-256: 4f671fcfee78fdc331948db6a602a7584c474f86bf880f452d60a6d8aacbbdd0
font_01_sfnt_off00013e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E56 11108 bytes
SHA-256: a149030ad4e1cef0eb32b6c4df982165553f8d526fa2e71869f5daf88835ad9e
font_02_sfnt_off0001633a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1633A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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