Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ab9d640e9dde2e…

MALICIOUS

PDF

90.0 KB Created: 2021-03-02 01:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 363f52cbe1d0c5d6e9a37d5163f4cb96 SHA-1: a6958621a01fd6c167a3d92269545377e473ebcb SHA-256: 93ab9d640e9dde2eb792b1e152e41109be79171bb99a4d9c55bcacf8e6aacb6b
116 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 indicating a phishing or trojan threat. The presence of an external URI pointing to 'resalured.ru' suggests a potential command and control or redirection endpoint. The heuristic 'SE_CALLBACK_LURE' strongly indicates a callback phishing or tech-support scam attempt, where the user is prompted to call a number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://resalured.ru/wix?keyword=social+profile+view+notification+chrome+extension PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413590/normal_6012093410684.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/kQBgfHd/wigukudefevobodogek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5fe34a5865ae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_6021a31de8d27.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/acara_naplan_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/X0thgfn/bubble_bobble_4_friends_switch.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/memobofilenabon/xunum.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/fimak.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/rodajapugowavubawedatex.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/algebra_2_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/compatibility_report_natal_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/arijit_singh_new_song_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/kowixavobozafezod.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/do_dryer_sheets_help_keep_bedbugs_away.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/bar_graph_word_problems_worksheets_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/menirobeso.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/12602215866.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_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 5368 bytes
SHA-256: d52bb203115d6f1c9c37a84a476b085f46e2177cbcd241dde3a8271189fa0e97
font_01_sfnt_off00012140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12140 13496 bytes
SHA-256: b003e3cd2ae344ebb71a9ec56e6a5805f9798bd15d01e93526eb89985aa01e4a
font_02_sfnt_off00014c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C16 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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