Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dff72753d4f3f8…

MALICIOUS

PDF

71.8 KB Created: 2021-03-13 19:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 626df34075c7ed9db9c794d2702f197b SHA-1: a55feea0c0bcceed178c230e41fcbd6539d454e4 SHA-256: 03dff72753d4f3f8db5c66bc4e027090a00d1f907321071c6c2422a92b3a9659
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL, 'https://lozipotod.ru/strik?utm_term=junie+b+jones+books+1-28', being flagged as external. The document body, though heavily obfuscated, suggests a lure related to 'Junie B. Jones books'. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious intent by indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://lozipotod.ru/strik?utm_term=junie+b+jones+books+1-28 PDF link annotation
    • http://probnik1313.tech/vineland_iii_online_scoringcz614.pdfIn PDF document text
    • http://bigowet.xyz/how_to_find_initial_velocity_using_calculusb3z8f.pdfIn PDF document text
    • http://manenumo.iblogger.org/kenmore_elite_washer_clean_light_flashing.pdfIn PDF document text
    • http://pigovaze.iblogger.org/cheng_man_ching_37_form_list.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/alchymista_coelho.pdfIn PDF document text
    • http://bluhgang.best/bekabafaxijidh2mze.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/filufunujejo.pdfIn PDF document text
    • http://texno3ua.com/464697580868wikh.pdfIn PDF document text
    • http://givepamodugag.22web.org/aqualink_rs_serial_adapter_manual.pdfIn PDF document text
    • http://desokore.medianewsonline.com/panasonic_viera_smart_tv_touchpad_remote_control.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dotalikajulu.rf.gd/familia_bixaceae.pdfIn PDF document text
    • http://refowokewip.rf.gd/avenged_sevenfold_album_nightmare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b158892e-b0fb-43eb-9957-dc80479778ac/what_is_salt_water_chemical_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/lekogelus.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/gagoxevelunu.pdfIn PDF document text
    • http://nifukugobu.rf.gd/34934859617.pdfIn PDF document text
    • http://mudotepejix.epizy.com/sugozuwukumesujejinek.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/english_grammar_exercises_online_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51427b46-9591-4e9f-be77-bb1f51d657e5/kazitomebedava.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/8356374527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1a62f2-2f5f-4928-9470-d06c61647a7a/37454177294.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/32877107061.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/85856518026.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 5020 bytes
SHA-256: bb83e30e08faac749162ee5b5b4c88c50aaa61b43d6f9659a497f356d45dde7b
font_01_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 12124 bytes
SHA-256: a8034ba63c9dd84a3f11b62ad8b1cfcd1ce054f5383e97fbf3f21e37e9a6a8ba

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