Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a3c6d843924781…

MALICIOUS

PDF

218.0 KB Created: 2021-04-08 03:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f097302e8a5f88c4dfe6b0bc820c7ce0 SHA-1: 48c7537a1c52f6c8f8e2df8cc740e675f383a7f3 SHA-256: 28a3c6d843924781455cfd208148939ed32752ee0a2f6fec509367d3eca185ef
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 phishing or trojan threat. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site or download a payload. The document body, though heavily obfuscated, suggests a lure related to 'great writing 1 pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://midufefew.ru/wix?keyword=great+writing+1+pdf PDF link annotation
    • https://cdn.sqhk.co/tarudifirew/D3iev4j/cut_rope_light_to_length.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/eBmaZgi/demise_of_nations_apk_android_oyun_club.pdfIn PDF document text
    • http://kyukty68.xyz/29662928498oj0s8.pdfIn PDF document text
    • http://lnstagramcentre.net/webidekasok1qrmd.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/dJihWqj/72771440898.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/hLjagfJ/cross_stitch_games_free_online.pdfIn PDF document text
    • http://izzzaaa.space/follicular_lymphoma_treatment_guidelines_2018d4kmq.pdfIn PDF document text
    • http://kismyketio.com/slow_motion_video_app_android_freeljj83.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/Bhahhye/free_christian_chat_rooms_for_seniors.pdfIn PDF document text
    • https://cdn.sqhk.co/jumuxabag/bhbsUha/33590852449.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/hhchhgi/top_ten_songs_right_now_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/pipezifiwip/TxpQubj/alchemy_gothic_puzzles.pdfIn PDF document text
    • http://50offshop.pro/aliado_por_amy_tintera_ledo_on-line26jfj.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://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_28fc035be055482dac76fba9c357a492.pdf?index=trueIn PDF document text
    • http://zenutetuzobo.epizy.com/momisulojanetamugujim.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_7833f67496ec4e3698ca5b4222af9d87.pdf?index=trueIn PDF document text
    • http://tevimumuto.epizy.com/ritawidewikefojuj.pdfIn PDF document text
    • http://rexawego.epizy.com/rebipitod.pdfIn PDF document text
    • http://zewipidurat.epizy.com/77712919119.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_a105a22771454e669896aac1a8279511.pdf?index=trueIn PDF document text
    • http://tavopaku.rf.gd/guia_ceneval_administracion_2020.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_fa116373dce247af999f5f82e6d83087.pdf?index=trueIn PDF document text
    • http://jogubemiviju.rf.gd/spanish_medical_terminology_certification.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 180980 bytes
SHA-256: 53126e9ba928fe5fffe8c78de6803f80a77df60fdc6ececeead264963affda9e
font_01_sfnt_off00031456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31456 4852 bytes
SHA-256: 0e9e7a6b1dfdcd9f889bf9c35b857b39288775575cf8415b93da2d819324ecc5
font_02_sfnt_off000324f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324F9 10816 bytes
SHA-256: ef4631e02fc84ce70a098020b76d0dc258b902ff8a0484a249e2145dd01ddc66
font_03_sfnt_off00034a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A04 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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