Malicious PDF — malware analysis report

Static analysis result for SHA-256 1249064223f9c205…

MALICIOUS

PDF

96.8 KB Created: 2021-03-17 01:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe38ecb7a3db632d49d1c002b3bf26c6 SHA-1: 758250a3dd0ea2dccfc586735ff46a2dcaa46cc0 SHA-256: 1249064223f9c205da9cadfef036cf20a98edeaecd9a4021e55168c6098c028f
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, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=drrr+grade+11+pdf
    • http://zuraleres.mywebcommunity.org/amar_chitra_katha_all_books.pdf
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/6284501.pdf
    • https://dugemitisij.weebly.com/uploads/1/3/1/4/131409309/75d59e1b6b8.pdf
    • http://muzibatixabu.mypressonline.com/jofotiliwesajivu.pdf
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/450939.pdf
    • http://ramajojofobo.22web.org/sitore.pdf
    • http://molipetofokeva.22web.org/8116716571.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c5833787-048a-4ef4-9b45-181b55863ede/tenergy_tb6b_manual.pdf
    • https://uploads.strikinglycdn.com/files/87951536-d854-4a7a-bcb0-7a9366658590/43130838260.pdf
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_a1df3a5648f24c87964174019e027437.pdf?index=true
    • https://uploads.strikinglycdn.com/files/803e2563-113e-4d92-af3c-5bc920723859/el_arte_de_amar_erich_fromm_libro_completo.pdf
    • http://kifavudufolafu.epizy.com/16497227441.pdf
    • https://uploads.strikinglycdn.com/files/398330d7-8958-425f-8a25-0f0e3f98789c/weber_kettle_grill_replacement_grates.pdf
    • http://fanugisenok.epizy.com/probability_permutations_and_combinations_worksheet_with_answers.pdf
    • http://guvipum.epizy.com/navien_nr_240a.pdf
    • https://uploads.strikinglycdn.com/files/2b2e7d4a-b6f9-4b82-a81b-3771bbcc3da7/tigewivavewukogad.pdf
    • https://uploads.strikinglycdn.com/files/fe66f235-7c2d-49f4-8f29-10fca5bc0f57/fisher_price_deluxe_infant_to_toddler_rocker_recall.pdf
    • https://uploads.strikinglycdn.com/files/c489be83-0353-4193-b058-5cb5f1004338/change_standard_reader_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/0b8e8398-3e09-4083-ad0b-224c50705679/stanley_tre550_parts.pdf
    • https://uploads.strikinglycdn.com/files/3c197a4c-d523-4d38-ad06-18562ff327cb/8610728462.pdf
    • https://uploads.strikinglycdn.com/files/53a938d2-5204-44cd-baf4-e08c83f66ede/tiderewukuwepifon.pdf
    • http://fuvuvadut.onlinewebshop.net/cules_son_los_sntomas_de_piedras_en_la_vejiga.pdf
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_431592b429fe4e99bfdf0a4571c405aa.pdf?index=true
    • http://faxevimisosideg.myartsonline.com/aerobic_biodegradation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012763.bin
eb0617251a7cae8cc087c85e89be948b89bbd915555e1c8ab53010352fb46af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 5048 bytes
font_01_sfnt_off000138ac.bin
ec425a1e5e022058b11e3cfb10f02997582fff962135fc5231950b34b4949c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138AC 11392 bytes
font_02_sfnt_off00015f20.bin
e21e86dd68ce2a50458ef8292a0df966f4d435db354e59b53c08ac24b80176cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F20 16124 bytes

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