Malicious PDF — malware analysis report

Static analysis result for SHA-256 88467d5b43f741f9…

MALICIOUS

PDF

85.6 KB Created: 2021-05-01 19:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 37178d4320cbd9351d50973d74829ef1 SHA-1: 876b2d635ad39fc166cfc97d1e9b027084d2150a SHA-256: 88467d5b43f741f934b014aed8c10c488c8de911e6331732642008a3f8df61eb
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Daewoo air conditioner parts', aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=daewoo+air+conditioner+parts PDF link annotation
    • http://xokezuwadem.mygamesonline.org/27406364605.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/69963434499.pdfIn PDF document text
    • http://nateribebomulaz.medianewsonline.com/devi_bhagavatam_telugu.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/vertical_balance_sheet_format.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/hfo5Oji/renolutufesoxoxibat.pdfIn PDF document text
    • http://nusixogej.iblogger.org/fubalakepugibisarub.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • http://logekolumo.22web.org/fosonugixalalunu.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/can_b_positive_blood_type_eat_popcorn.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/jJI7wS0/43139903048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a8c86c1a-9119-48bf-86ff-c91b3f21db63/percy_jacksons_greek_heroes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/70275419721.pdfIn PDF document text
    • http://talegotowaf.epizy.com/delonghi_ceramic_tower_heater_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/samago.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/email_extractor_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a606799-d013-4bf9-a720-fc5d033e6fdc/47479411839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131f3b3e-50ba-4caa-bf73-5e546b359753/dns-323_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/agree_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/etekcity_zap_1fx.pdfIn PDF document text
    • http://dudakesiburegig.rf.gd/vespa_primavera_2018_manual.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 4912 bytes
SHA-256: e080a1e2213cb48148ba4d3a991bb47a02f94d94a7c35cf39340777dc64b01cc
font_01_sfnt_off00011442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11442 11344 bytes
SHA-256: 92d9df31368f11cb616a22426d250ddff33664ef21fa83db1073c7eb6a778222
font_02_sfnt_off00013ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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