Malicious PDF — malware analysis report

Static analysis result for SHA-256 19be3b5d3d3264ab…

MALICIOUS

PDF

73.2 KB Created: 2020-12-03 20:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b553b083885649e463323e905b7e641b SHA-1: b445a23dafd32377f4c9d556bd48795c6a520e66 SHA-256: 19be3b5d3d3264ab98a55741c8fdeaae2d4fac611c7eb384a9c0f16235d2c0f1
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains external URIs and a callback phishing lure, prompting the user to call a phone number. While no scripts were explicitly extracted, the presence of external URIs and the phishing lure suggest an attempt to trick the user into a fraudulent transaction or information disclosure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=lotane+and+associates+phone+number PDF link annotation
    • 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/fopalew/73252199934.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc563a5a3bf4b14abc71da8/t/5fc7c1b51d106d256bcf21f2/1606926774580/fifth_edition_character_sheet_walter_kammerer.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/nunizekezegirumiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59bbffc-2a6e-4aff-8ecd-d261a1926434/mizipibibaxizefata.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50e27acac6192ab7683b/1606373606482/44340246275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d3b1ac-2bc3-431d-af08-ce8b79ab1259/fofimasa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b80e5bcb0228a28e2589/t/5fc3cfce173fb5383b17fd0e/1606668239290/say_what_you_mean_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/priest_leveling_guide_ragnarok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e1846b97992eb55bfc03/t/5fc1adfe3f75b166431369b1/1606528511157/student_planning_risd.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/by_turning_on_wifi_scanning_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0779b1ed035389f7578/1606283383755/shopping_for_the_best_buy_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0809b7a66e04eaf6743a/1606223899680/final_fantasy_xv_piggyback_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab9d570-5878-4b07-8cae-a6502689acf5/78004083140.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52a44e98326c020756b4/1606374055200/kitchenaid_dryer_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/wubanowisiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845a3a5c-3abf-466f-8c28-65c442c9a491/zulikejok.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_off0000d57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57E 5244 bytes
SHA-256: 467224607bc52b55bb23fbe386c2869a24e292116c3bbea442b9dbb36f71d620
font_01_sfnt_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 9972 bytes
SHA-256: c6d985f51f4f6555abaa7249f11e53e10473de3f10c64c0cdb8e654141e6cae7
font_02_sfnt_off0001093a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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