Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97d0cac426eab48…

MALICIOUS

PDF

90.5 KB Created: 2021-03-24 00:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 62645cdb5f02969e8b96abaaa2f8c608 SHA-1: 4f0be92bdfc58c83ead43431d4b0e41938a221f4 SHA-256: f97d0cac426eab4806a0aead668fb3ed382ce85c2b7359e1229beee3506333cb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains keywords related to 'persuasion psychology' and is likely intended to trick users into visiting malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/strik?utm_term=routes+to+persuasion+psychology PDF link annotation
    • https://cdn.sqhk.co/rasepotobami/djeiejh/kibiguduvujovesis.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/gjfmjjI/xofipodido.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/QgjjaQQ/sdge_power_outage_alerts.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/icNvigj/wemomonokarubi.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/gdrb6if/magically_powerful_word_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/pegiridireva/cghgjhb/garevesopegobo.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/cerfa_15776_modifiableypvkc.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/fugfI6y/gumenadowipunesa.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/jkrk7hh/68967405602.pdfIn PDF document text
    • http://sodahq.club/62918473998afeet.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/ajcPTge/car_running_rough_after_spark_plug_change.pdfIn PDF document text
    • http://lixejinokegiror.22web.org/rerafovinefowegevonami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepedijuva.epizy.com/jozipapivupere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58d249f-5db4-46ba-b41e-859b5b2be752/weight_lifting_sets_reps_chart.pdfIn PDF document text
    • http://gevusival.epizy.com/sciatica_pain_relief_stretches_and_exercises_for_piriformis_syndrome.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/bosapupezava.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/cable_one_email_setup_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/20799075970.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/are_there_plans_for_how_to_train_your_dragon_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbea0f6-2b9b-4536-ae86-3400a14215cd/samsung_bd_p1600.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/zesinemu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11253 5304 bytes
SHA-256: e9703202a73e393926f9afc5054ba87c925b8ae6f787a9dad236f27eb9bdd9d0
font_01_sfnt_off00012466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12466 10544 bytes
SHA-256: ce6af6086b2c597e90886f6c92125fbdd83eaca2c9f98830b7021c7f7eb1dbc8
font_02_sfnt_off00014885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14885 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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