Malicious PDF — malware analysis report

Static analysis result for SHA-256 34fbb73a05c4791e…

MALICIOUS

PDF

74.6 KB Created: 2021-03-20 05:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1dd2d29c42bbbf5b87774a4ee28eb183 SHA-1: 7fda3a431831005a119283326f68935da1967a88 SHA-256: 34fbb73a05c4791e40d5e9cbc725c54c2bbf969457253e87de41f5fc467b9e68
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external URLs, suggesting a link farm or redirection mechanism for malicious content. The document body, though heavily obfuscated, indicates a lure related to 'agro food processing pdf'. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

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
  • 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://seumenha.ru/award?keyword=agro+food+processing+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426257/normal_5fc6040e4bf26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_5fd915f02fa9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_603b449df2d16.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/florida_boating_accident_self_report.pdfIn PDF document text
    • http://probkin34.xyz/manual_amplificador_qsc_rmx_1450xvkft.pdfIn PDF document text
    • http://gloslides.com/variable_star_finder_charts4t4e1.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/jipukoteguvuxoxi.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/what_is_the_lightest_weight_truck_camper.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/waxanizoviwuxo.pdfIn PDF document text
    • http://rolutaxab.22web.org/john_dewey_experience_and_education.pdfIn PDF document text
    • http://razvivatel.blog/what_type_of_play_is_a_dolls_housessl4s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutazobizomobuz.rf.gd/peugeot_boxer_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/mivefoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/kibivejuzeguwu.pdfIn PDF document text
    • http://podifugugak.epizy.com/zolotanovigepilowijokefed.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/how_do_i_update_my_garmin_nuvi_sat_nav_for_free_uk.pdfIn PDF document text
    • http://desavoz.epizy.com/wofovumerafogoz.pdfIn PDF document text
    • http://rixojitudoj.rf.gd/how_to_use_anova_precision_cooker_manual.pdfIn PDF document text
    • http://zelagipu.rf.gd/alimentacion_baby_led_weaning.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_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 5068 bytes
SHA-256: 6eba90b3efd26a1dc990dd519fcc9f937dc6b7c5acca7a2f28171218949e09bc
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 10108 bytes
SHA-256: b71b1c68872fc4a391e2e7d5d237f800b07b6c04043b1369303286a86cd2da93

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