Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c658107be000e1…

MALICIOUS

PDF

100.1 KB Created: 2021-03-29 13:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a95a0b6705c4703e1175913ac23396e4 SHA-1: 50e5765b552cbc3f8c94405d1769e1e1b589c49d SHA-256: 20c658107be000e13785f6b9bde400df5bc4554a0b1c29bb5e658b0f7257ed12
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL 'https://nipisod.ru/award?keyword=flow+cytometry+pdf+free+download' suggests a phishing lure, attempting to trick users into downloading a malicious file disguised as a legitimate document. The presence of multiple unknown URLs further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/award?keyword=flow+cytometry+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407576/normal_602c06469ef92.pdfIn PDF document text
    • http://subonus.ru/4865037111264w3s.pdfIn PDF document text
    • http://berozabekep.sportsontheweb.net/18568071452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_605a2453a450a.pdfIn PDF document text
    • http://aires.fun/bagepekoduzojawemusugudobih0u8.pdfIn PDF document text
    • http://maturibcgj.space/tokeruzewofabugirapixogud6jim.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/advanced_trainer_cambridge_download.pdfIn PDF document text
    • http://hardcreditcheck.info/is_netflix_sustainableuxlqm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fb763b-0a88-4584-b4e2-13c3460d57de/what_is_the_latest_generation_fire_hd_10.pdfIn PDF document text
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_9925efc71df243bf9d5ebe1e7307d869.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dekogamik/roxesa.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/79545385003.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/tajagodija.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/7296107724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6c5740-9ecd-429c-8a6e-80da79a84c5c/sig_sauer_p226_22lr_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/korogujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f407797-a3f6-4343-9cc2-40851afb0ac9/venenanapo.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_1cafb94710cc48e9ac37996f743a02b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19301b56-165c-4385-a31e-3d8ad6145cec/programmable_logic_controllers_5th_edition_chapter_2_answers.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_162a5e58ee804bfbbdebb68f8f14f019.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b83d39-37b0-4bed-9702-351f657ab1c3/cell_and_molecular_biology_major_uoft.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13338 5272 bytes
SHA-256: fe3f84dbb57609b6cc7c9255d0224c80572175b0140f765bb8a5c18769282cea
font_01_sfnt_off0001452b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452B 11732 bytes
SHA-256: 65ebecf8494e6aff5c6f5447ea4616f81de13aedca957e24503fefc85c6ba5d1
font_02_sfnt_off00016d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D5B 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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