Malicious PDF — malware analysis report

Static analysis result for SHA-256 df10b6c20fe2e129…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 00:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 482308c228c00c2c662b75c5ce50bad2 SHA-1: 21b57a3da35602fa0f1e63205a144543c5ba50d6 SHA-256: df10b6c20fe2e129aa32ef2bde8baa8e47c1a965c9e69303573abe1d5abf1516
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'calisthenics e bodybuilding pdf', aligning with a phishing attempt to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=calisthenics+e+bodybuilding+pdf
    • https://cdn.sqhk.co/mepetiruzi/jmhcLij/aircraft_reconnaissance_in_world_war_1.pdf
    • https://cdn-cms.f-static.net/uploads/4446380/normal_601ec91ef3e57.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_602f4f157df4e.pdf
    • https://cdn-cms.f-static.net/uploads/4367000/normal_604bad5e85d44.pdf
    • http://esclub.info/supersonic_remote_codes_xfinity7a34t.pdf
    • https://cdn-cms.f-static.net/uploads/4409628/normal_60292629b2aeb.pdf
    • http://opensalle.xyz/leruxewuxizurofewesotemor54mdk.pdf
    • http://indital.fun/joe_turners_come_and_gone_audiobook20s1m.pdf
    • https://cdn.sqhk.co/vopunokapire/dbSfibI/snapchat_login_online_no_download.pdf
    • https://cdn-cms.f-static.net/uploads/4417024/normal_60243c502692f.pdf
    • http://supsun-aero.com/72970166222rvzso.pdf
    • https://cdn-cms.f-static.net/uploads/4461483/normal_602ed09a05bd0.pdf
    • http://lnstagramverifiedsbadgesforms.com/67193141201e9922.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1d0c9455-5009-4ca7-92f9-b701d0869ce6/the_expanse_season_4_characters.pdf
    • https://s3.amazonaws.com/muwemivumazulax/10354445940.pdf
    • https://uploads.strikinglycdn.com/files/abab8a39-a217-49f6-a1f8-97b34166ce0e/walmart_pharmacy_phone_number_menomonie.pdf
    • https://s3.amazonaws.com/zufojadibi/61660071741.pdf
    • https://uploads.strikinglycdn.com/files/867983c4-590b-4f7b-8931-1c493f949e43/mexiruxod.pdf
    • https://s3.amazonaws.com/lakadutof/badri_aur_budh_video_3gp.pdf
    • https://s3.amazonaws.com/sevoga/94533740339.pdf
    • https://uploads.strikinglycdn.com/files/b5382873-128d-4ca1-ada3-30af289e9efe/what_is_pellon_fusible_interfacing.pdf
    • https://uploads.strikinglycdn.com/files/1749dd82-dc11-4601-b980-266b0ed65bf8/how_to_fix_code_35_thermo_king.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_off0000f840.bin
fbf143662e6504e8a3158fe681589d7aaec4f31fe369b28cbae5ea8a5d4c87fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 5468 bytes
font_01_sfnt_off00010adb.bin
c52ce33e5dfb526edf623b37cf9872b1882a565c25199d8f99c85c942fd73222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 11924 bytes

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