Malicious PDF — malware analysis report

Static analysis result for SHA-256 83533a7411104245…

MALICIOUS

PDF

177.0 KB Created: 2021-03-31 14:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 86781be0610db3778f0247f51997a9a2 SHA-1: 8f5b69a258e0ba3f025ee0097145df9096e3e4e8 SHA-256: 83533a741110424577e269cc36c7dd6007ebe4f0a8df6caf830e584beb6ed8bd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were directly extracted, the presence of external URIs and the overall classification suggest it functions as a downloader or redirector for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 4

  • 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://dugedepap.ru/award?keyword=aristotle+rhetoric+book+pdf PDF link annotation
    • http://bristol-yalta.run/46861429589h1md2.pdfIn PDF document text
    • http://wssummer.space/nabujorevazamudujinhpsju.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/ayq8rfe/b_r_i_d_e_g_words.pdfIn PDF document text
    • http://filmera.ru/cestina_expresslxz7z.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/ghogiji/sapubasatelalixaxifokopos.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/4ahjhja/nora_fatehi_new_song_pyar_do_pyar_lo.pdfIn PDF document text
    • http://nout-prokat.website/bowovewedenadaklp23x.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://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_0442d617418146518c3f0c48a3b5cb3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widofafane/sutulubujozuwodoselo.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/go_to_facebook.com_login_identify_and_follow_the_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/can_you_put_dehydrator_trays_in_the_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/9065933156.pdfIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_e2100f049a6f435b99fc92555129a8a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/jikuresutufakulupudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af10aa91-adbd-458e-a9ae-d5c0b4bc111c/mental_status_assessment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/50926061124.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/vumiwekefonagaw.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_a338ce80f0664801997f978d0d9524e0.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_2ece23e00b3e41b88412d0890b033387.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b072c8-1c0c-4679-b6e9-9b0cdf7a3ade/gijeginimunebemule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4920fd37-5485-4b61-accb-e2e8b150da9c/how_to_test_blue_yeti_mic.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/cocoa_beach_fl_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/zumoj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25176 4908 bytes
SHA-256: e28c1a2013f83ef538eee25f793c0a35ed28208c3c5365fd49a60f0deec39566
font_01_sfnt_off0002622d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2622D 16544 bytes
SHA-256: c4c88ad7b69e0ad231c2a74e8e4efcdb03cd7f9b40a67770289c91abe35fb0f5
font_02_sfnt_off0002929f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2929F 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off0002a737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A737 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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