Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd537f3ec6605168…

MALICIOUS

PDF

82.8 KB Created: 2021-03-15 07:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27f61aa19b1282eba908289ccd985901 SHA-1: 1fe52fe210c246e12ad1aaaf9facfde71abd24bc SHA-256: fd537f3ec660516872ef06add40c1f6aa0765bf19d6ada53ce5f9c8622e172c6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, with a primary URL suggesting a phishing or SEO spam lure related to 'hallelujah chorus organ pdf'. The presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=hallelujah+chorus+organ+pdf
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fd7b4ec47433.pdf
    • http://rimaloxal.22web.org/bates_guide_to_physical_examination_abdomen.pdf
    • https://cdn.sqhk.co/dovoxukeni/7PzgcMz/sad_ringtone_2019_punjabi.pdf
    • https://cdn.sqhk.co/tivinarafuvu/hagchhm/fall_guys_xbox_date_sortie.pdf
    • https://cdn.sqhk.co/watagovu/uR6yFhg/twinkl_classroom_rules_template.pdf
    • https://cdn.sqhk.co/fawabanof/tCqigif/tukamibalavi.pdf
    • https://cdn.sqhk.co/zogowefu/961Hzgd/cd_baby_disc_manufacturing_phone_number.pdf
    • https://cdn.sqhk.co/liregagibago/N3hfp46/blast_furnace_gold_guide_osrs.pdf
    • http://50offit.pro/kebesommuxw.pdf
    • https://cdn.sqhk.co/sadetujadufi/giiggh3/texupaxujokaxefetafovuw.pdf
    • https://cdn-cms.f-static.net/uploads/4370791/normal_6022056ac6914.pdf
    • https://cdn.sqhk.co/vejurumilef/gdjchh0/1645158907.pdf
    • https://cdn-cms.f-static.net/uploads/4453329/normal_60445f0cde16f.pdf
    • https://cdn.sqhk.co/voravaxa/iaukijJ/muwefimitebepal.pdf
    • https://cdn.sqhk.co/dugelabomaw/jaGhceT/kavixurovadufefubijofi.pdf
    • http://okstore.info/my_talking_angela_apk_modelqtd.pdf
    • https://cdn-cms.f-static.net/uploads/4366957/normal_6049d549b5bfa.pdf
    • https://cdn-cms.f-static.net/uploads/4376359/normal_603629622ed59.pdf
    • http://masimepipet.22web.org/subevotafovufoxajez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_683e6938dc444961bf09b746dfb50eee.pdf?index=true
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_a19bedb683014b9bba7be0213870b480.pdf?index=true
    • https://6c967678-3fce-4d1a-bd98-eb0ee65f74fc.filesusr.com/ugd/9c43ec_3c5bf8310e994fd48c040d7f3044e9b9.pdf?index=true
    • http://dimafox.epizy.com/i_found_grace_sheet_music.pdf
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_0a23c88e51f84c8ca3b0bc79e06fd6a2.pdf?index=true
    • http://sobojagi.epizy.com/bunezupul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ee.bin
ff759ce97b536ae48893913db619faf3c62b01e8b4303624eb2b2a66178e82f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 5208 bytes
font_01_sfnt_off0001069b.bin
2d76100f913d1979c547522ac4340f519966e64da516f9a7fcd8bdef2ea900f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1069B 11624 bytes
font_02_sfnt_off00012dbb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBB 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.