Malicious PDF — malware analysis report

Static analysis result for SHA-256 1236909d56e52091…

MALICIOUS

PDF

76.0 KB Created: 2021-03-08 21:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0d92c1328eb60124a53f23459285d9ae SHA-1: a691b6d67456edf730e111691530dd347c1e890e SHA-256: 1236909d56e5209111ec84786abf083883b70254385db94a4afaf7bc71e2fa87
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used to host a malicious payload or redirect to a phishing page. The document body, though heavily obfuscated, suggests a technical or product-related lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=coreless+magnetic+current+sensor PDF link annotation
    • http://4gusevshop.website/billboard_top_rock_songs_of_the_70_sr8v1p.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/fjjMU9N/gluten_free_pound_cake_recipe_lemon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_5fff3706db08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fdb593c05123.pdfIn PDF document text
    • https://cdn.sqhk.co/tufiroxova/Bhgdhbo/lego_legacy_heroes_unboxed_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/hhchfJi/46328810818.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/b3hj2Sv/vonukasagebam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_600d210e1d122.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/geJicja/ragibedexuwekadakodewugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424662/normal_603690262beb8.pdfIn PDF document text
    • http://fc-aromat.ru/the_art_of_rick_and_morty7day0.pdfIn PDF document text
    • 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://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_7781c227b6b94313980dd980fc1a2fb6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/audition_adobe_1._5_free.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_30b7cc510eb34d30afd96e724cfe26cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pomaxa/56427956115.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/amazon_store_app_for_android.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_b96fb13fe3954e00906ba35b87c1b410.pdf?index=trueIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_1f3cd09e8d8e483eb9e8bfd4917e5fdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/gmail_for_windows_10_32_bit.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_73ac047f3ca042908d2ea33ebb5a5c3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/78941254079.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_657d33d7cf2641f9a4bd4a24f57c9341.pdf?index=trueIn 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_off0000de39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE39 5024 bytes
SHA-256: d7c36d81111bfa80046e18abf56c823717f8765b347656da789d44c3760807ad
font_01_sfnt_off0000ef37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 10824 bytes
SHA-256: 9fe71db46972bd82a428fb1467e0e670945a397dfac118cbc6bd61059bb09806
font_02_sfnt_off0001142d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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