Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e03774b41ce8ea3…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 22:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0a3b6bcb2784e61c291d895b718cd7f SHA-1: dfb56fe4b3e997c3373678ff91c86a1721c0a0db SHA-256: 1e03774b41ce8ea3c5ad94441f14336111ccc0ba58a72a81354ca09863c559f0
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to health topics to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=anorexia+y+bulimia+en+ni%25C3%25B1os+y+adolescentes+pdf
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5fe340abd43e1.pdf
    • http://rimaloxal.22web.org/xulitizadudumuzemaf.pdf
    • http://kexevosizamem.iblogger.org/new_naruto_game_2021_ps5.pdf
    • http://bagajuz.iblogger.org/givefodewobagabijesosel.pdf
    • https://cdn-cms.f-static.net/uploads/4381532/normal_6029542ae5a83.pdf
    • https://static.s123-cdn-static.com/uploads/4410965/normal_6001bf5720906.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6b7f394c-c3d4-4600-b565-b615d1175ee5/newtons_1_law_of_motion_wikipedia.pdf
    • https://s3.amazonaws.com/lomogas/bitdefender_mac_full.pdf
    • https://uploads.strikinglycdn.com/files/27a48376-5c65-42fb-81a4-2568ff9596ab/guess_the_pic_2_answers.pdf
    • https://s3.amazonaws.com/sezebepit/89832336716.pdf
    • http://gobofitis.epizy.com/indexing_and_abstracting_in_library_science.pdf
    • https://s3.amazonaws.com/xapidajovaji/taluwodew.pdf
    • http://tonabezagarizom.epizy.com/xumabatagofokax.pdf
    • https://s3.amazonaws.com/mesixadelomomo/2113695277.pdf
    • https://s3.amazonaws.com/polojuliragam/61380686680.pdf
    • https://s3.amazonaws.com/zewimu/search_for_hidden_objects_app.pdf
    • https://uploads.strikinglycdn.com/files/92b961bf-7712-4114-93a8-862d53fe3652/94967227119.pdf
    • https://s3.amazonaws.com/tedowafomaru/star_trek_movies_reddit.pdf
    • https://uploads.strikinglycdn.com/files/6bf0b837-887e-4547-80a9-1431e87d1a1c/82579062581.pdf
    • https://s3.amazonaws.com/sazomo/82684521132.pdf
    • https://s3.amazonaws.com/gazivemon/keithley_dmm_2000_datasheet.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_off0000f3cb.bin
721f31f62e0f46a2f163e8caf46f96cfce760fdf6aab43eca519c36f87e364dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 5812 bytes
font_01_sfnt_off00010744.bin
f5c9c7181c634f847dc0f9c3a8771a41f5e802858e361dfe9d5b2d835807da46
pdf-font-stream PDF embedded font (sfnt) at offset 0x10744 11932 bytes