Malicious PDF — malware analysis report

Static analysis result for SHA-256 3150563e9d080e3f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-10 02:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0500fba791175af3ca62b9efa21ee0c0 SHA-1: ff162eb7ff22f473b774095ea907fd11ab574ba1 SHA-256: 3150563e9d080e3fa3bee638e158c33a0ad1b3533512e858ea372835a863b00e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one pointing to a suspicious domain ('maypoin.ru') that is likely part of a link farm or phishing campaign. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=support+escalation+matrix+template PDF link annotation
    • http://bugosegu.scienceontheweb.net/sekerimipipawikaxotewol.pdfIn PDF document text
    • https://zavifojixu.weebly.com/uploads/1/3/3/9/133997579/dekepajobikeve_bigusozedevuvo.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/relanurevurigoporefa.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/edfc4c11073e.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/5160089.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/18918098536.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/why_is_the_chocolate_war_a_banned_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/idol_champ_quiz_answers_december_2018.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_a4445129f6204a1088b18b5c461555be.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_71aa090206b3416fa453f5b6654352e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/lusukigusawaxirizonasabu.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_0ea1e7c587574485ae9934ed9887d582.pdf?index=trueIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_651f6654969e4ecb81a9db78b2f973bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/tixobewom.pdfIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_fcd2bb1a7bf942d6a989422f44ccd126.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/simivud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1cb6f9-4270-4765-851e-756a8fb166ad/mental_toughness_questionnaire_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/tamulajatajigukakuwede.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/39829397351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e31217b-4b60-4ce3-9020-0080b38eb420/origen_de_un_proceso_de_investigacin_cuantitativa_cualitativa_y_mixta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcdd452f-9306-4f3a-9b39-fa660ea17465/fairy_tales_anime_seasons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8181124c-cd3c-4ca5-8391-fd22a9ef5bbc/trials_of_apollo_the_tyrants_tomb_archive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f420a1-7371-418f-af50-841e764d566b/80211119944.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_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 5252 bytes
SHA-256: 303b2fc2e2578d469b1e1e34cae279a4c394688e2d84daff7c464d5875e193c5
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10780 bytes
SHA-256: d8158fabf18760fc2eaf4e5c33df74e2d4d6b0204bf9b04ddfa3863fafe6b4e9

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