Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c84ddf3ec6155c…

MALICIOUS

PDF

76.1 KB Created: 2021-03-13 22:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccec833200427e070c8cb94632404c42 SHA-1: 2a7d33297a1951ea93ff53c548143e42f527dc05 SHA-256: 93c84ddf3ec6155c1731377ec2e4a1609e2f3a116fb71851b16ffb6b6b58b133
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to 'leave letter format in english for school pdf', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=leave+letter+format+in+english+for+school+pdf
    • https://static.s123-cdn-static.com/uploads/4410988/normal_5fe529b38fa0a.pdf
    • http://goromeo.club/82272371335azgc3.pdf
    • http://jadebey-x.com/73954427164mvyyd.pdf
    • http://fikakutipid.mygamesonline.org/mamuzejulaso.pdf
    • http://gagivukamuw.getenjoyment.net/vumegevubi.pdf
    • https://cdn-cms.f-static.net/uploads/4369491/normal_6036c38c25249.pdf
    • https://cdn-cms.f-static.net/uploads/4491159/normal_60215dcf5e358.pdf
    • https://cdn-cms.f-static.net/uploads/4405420/normal_602293ae1edf8.pdf
    • http://cmbespaceclient.xyz/application_software_websiteqoz1r.pdf
    • https://static.s123-cdn-static.com/uploads/4453754/normal_600389979f57e.pdf
    • http://pasikufopubiwo.mypressonline.com/buxikozolulataz.pdf
    • http://venolilixe.mygamesonline.org/706949627.pdf
    • http://digitalliteracyinstitute.com/lowrance_elite_7_ti_manual2vrs2.pdf
    • http://pewodebepefawi.scienceontheweb.net/sears_appliance_repair_melbourne_fl.pdf
    • http://mowefopovog.mywebcommunity.org/pozubitarewakumi.pdf
    • http://cashbackmoney.info/sperry_bridgemaster_e_manualfpwxa.pdf
    • http://pomemaxevisuma.iblogger.org/how_to_learn_a_programming_language_on_your_own.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiwosotu.myartsonline.com/wavanifotipogufineg.pdf
    • http://bolutiso.epizy.com/ahcpr_pressure_ulcer_prevention_and_treatment_guidelines.pdf
    • http://sudexixurijaxoz.atwebpages.com/native_instruments_maschine_mikro_mk3_midi_controller.pdf
    • http://faxiruvud.myartsonline.com/40260529865.pdf
    • http://kedekivotizera.epizy.com/differentiate_between_evolutionary_and_revolutionary_change.pdf
    • http://bixodog.rf.gd/63133140629.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_off0000eac1.bin
5636098db25f64f82e3b6854d6988c875e79ef1f7819b3ade3f8ebbd43f217a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 5572 bytes
font_01_sfnt_off0000fd93.bin
7313aa161debb67d0a3701cd210a40df84199426f67cd428b311f4c5efd2c3c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 10908 bytes