Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ecbc50416a6ad4…

MALICIOUS

PDF

71.4 KB Created: 2021-03-27 14:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a8e4af03ccc99537b9e0496110a0af02 SHA-1: a1d30531125ec5c9fce0aba01f72f4e303bd455c SHA-256: 11ecbc50416a6ad4d543f7f25fd8a8353c4c6a6bacecd622a8f70fa41f2300ca
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jottigo.ru', which is likely used to host a phishing page or download a second-stage payload. The document body is heavily obfuscated, but the presence of external URLs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=file+using+anchor+tag+in+php PDF link annotation
    • https://cdn.sqhk.co/wevavagu/fNghWif/romenifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_60510c14131fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368982/normal_5fc5ada4c94e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_6059f6617f2b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5fe337f24cf86.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/eGjaMic/stunt_truck_jumping_hack_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_6012fbfc86120.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/2gejien/my_talking_angela_free_online_games_play.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fe8830db3e18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495037/normal_5ffa80c022b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_605db73a498f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406191/normal_6002d0d5779fa.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/hjdhjgQ/bexejukavibefekutedarosor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_604a14013eaad.pdfIn PDF document text
    • https://cdn.sqhk.co/xazolilatu/rhggijc/honey_essence_mask_sheet_esfolio.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/jhnCRJL/26246956247.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://s3.amazonaws.com/rurovikejigibu/88806832697.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/how_much_does_a_graphic_designer_earn_in_the_uk.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_off0000ccba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBA 5032 bytes
SHA-256: 58801f1b769170a4af4c5602fe3362ee563f13c0708c346935b0a9d39fd94afe
font_01_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 10732 bytes
SHA-256: d99e084c1d48a0493f5590c2cca566c6d0ad5d4f2ed99708ab1487ce07ce716c
font_02_sfnt_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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