Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de6792713c93eff…

MALICIOUS

PDF

75.0 KB Created: 2021-03-28 02:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbdb8df0def3280dbca4f94e5d0f9ea SHA-1: 5893208407b4d83bf4c7731c3980256eb083d354 SHA-256: 5de6792713c93effb92664a25f194e82fccc1a34d781023bcf9b3f56a64d26bc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://nipisod.ru/award?keyword=the+bulletproof+diet+book+pdf` suggests a phishing lure, likely attempting to trick the user into believing they have won an award or are entitled to a book, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=the+bulletproof+diet+book+pdf
    • http://kirudikegopoded.sportsontheweb.net/61750440440.pdf
    • http://poguzozod.sportsontheweb.net/voworetozarad.pdf
    • http://mapugukabazewu.scienceontheweb.net/auld_lang_syne_means_good_times_ahead.pdf
    • http://fujigukatujewu.medianewsonline.com/kilijawiguwebirerakumemu.pdf
    • http://gilumesu.mypressonline.com/vox_ac15hw1x_footswitch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8421d355-6f4f-4861-956b-b8b9120e0b9c/film_fifty_shades_of_grey_full_movie_subtitle_indonesia_indoxxi.pdf
    • https://s3.amazonaws.com/tinezedu/tejemepinuramebatirumun.pdf
    • https://s3.amazonaws.com/gezejoputiwinu/google_spreadsheet_string_concat.pdf
    • https://uploads.strikinglycdn.com/files/8a4d3daf-1eff-4d66-a737-8bcf69bb7123/zaloxobunabezi.pdf
    • https://s3.amazonaws.com/kovilowab/lanuresebos.pdf
    • https://s3.amazonaws.com/dotivaf/pilolofusiju.pdf
    • https://s3.amazonaws.com/rafiralexezol/9138968166.pdf
    • https://s3.amazonaws.com/dazovosugev/56464955014.pdf
    • https://uploads.strikinglycdn.com/files/561eae1b-4151-4f1e-b132-0fe7831c80bd/el_dador_de_recuerdos_online_pelisplus.pdf
    • https://uploads.strikinglycdn.com/files/fe531985-ff44-4919-afcb-4dec70ba03e7/washington_state_university_address_for_taxes.pdf
    • https://s3.amazonaws.com/bidivo/how_to_see_guides_in_photoshop.pdf
    • https://s3.amazonaws.com/suzujewa/what_are_the_characteristics_of_egyptian_art_brainly.pdf
    • https://s3.amazonaws.com/sojuravewi/ronovewezutelisijo.pdf
    • https://uploads.strikinglycdn.com/files/d2fe1ab5-844d-414f-a9e1-d1a5da4053fe/how_to_use_the_dyson_accessories.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e871.bin
1515163f3ae2d332f71429bc777dc774a5ffc40f5277882573a42c392b1a77d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 4896 bytes
font_01_sfnt_off0000f905.bin
04b0f1e1acaa0cd587d12957078426c5d78e783a97f71753fb4d926edc3e74fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 10652 bytes

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