Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36ec01200331f49…

MALICIOUS

PDF

70.2 KB Created: 2021-03-20 20:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: de36ec023083d9824b8c40b3abc7e806 SHA-1: b591eac30a8b80d440088e8b606c133b9cbd9e76 SHA-256: a36ec01200331f492a264e92ca8e8492093c2f3b48d47a9daf9d4d13bd1a2a7d
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The document body, though partially obfuscated, suggests a lure related to 'Arsenico en el agua potable pdf'. The primary malicious URL identified is https://fokemale.ru/award?keyword=arsenico+en+el+agua+potable+pdf, which is likely used to host a secondary payload or redirect to a phishing page.

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://fokemale.ru/award?keyword=arsenico+en+el+agua+potable+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fdfffd22ed88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_604159e75ad8d.pdfIn PDF document text
    • http://re-prime.ru/what_are_the_basic_elements_of_good_storytellingfnn0j.pdfIn PDF document text
    • http://lifeit.pro/mtransition_zoom_crackcreez.pdfIn PDF document text
    • http://rozapunu.22web.org/barogifi.pdfIn PDF document text
    • http://hookup682.site/personajes_del_hobbit_la_desolacion_de_smaug00mw5.pdfIn PDF document text
    • http://alexandreablog.com/893345317846l5x8.pdfIn PDF document text
    • http://senogibe.iblogger.org/the_third_jesus_deepak_chopra_free.pdfIn PDF document text
    • http://parhelifrl.space/248481866422znkc.pdfIn PDF document text
    • http://naropiwazufilu.22web.org/furaxezivenegowabukiwiwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sexepafo.epizy.com/dioritic_magma_formation.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_3734b1c8fc0a44fdac4902fecc0d92b2.pdf?index=trueIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_7d7178ace5cc451887a369e4fe961e38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/hunter_gsp9700_calibration_tool.pdfIn PDF document text
    • http://noluboxemefosa.epizy.com/wavilewazofesizopasat.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/zoom_h4n_pro_battery_life_phantom_power.pdfIn PDF document text
    • https://db22a0a0-c6c8-4eb9-9878-037c50d93224.filesusr.com/ugd/e2b5b3_5896c567fd4d474c90f1ab56c48d856f.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_88165059d3ec4707b46bc2cdf4997e3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taguxif/gaxejebegadabufapufibakup.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_off0000d17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 5452 bytes
SHA-256: 4307df1825e9fe7c2d44552f054b80236da8d345cfbbcf3d69c08db2bb30383d
font_01_sfnt_off0000e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 11524 bytes
SHA-256: 2a411326a243fd47c5da47af4e131aa4f6e6d65a9ff5569faf788425eba61c87

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