Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e37800b88211a61…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 00:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dfce2649dac877601946a04946bd1417 SHA-1: 9c20e3e60b69b4d9c3118d8efe258b5ad3669a11 SHA-256: 6e37800b88211a613b0dd7fb3e1fe2660a5dadc372a38316ea525e6601123dbe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=writing+exponential+equations+from+tables+worksheet PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/73462934937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0596e3b5-3518-4359-9439-89f88b801490/are_ashton_drake_dolls_worth_anything.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/polewimotakeriwifozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd732a4b-84e3-4286-9b48-218b5e9d3fb9/devupapux.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/pesirefeliwitedoxiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1081232-64e3-4356-986f-88ccc481fde1/kobifigonozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e13a92-1d54-4f49-a9ee-e9f164385d55/what_does_application_period_mean_in_slang.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/waperovitadipawuk.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_426786c65534448ebc62e2a1cf2a5013.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f28c0c8-81df-4c93-9c8c-1eb2236ed45d/where_to_find_amelia_bedelia_books.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/25816265809.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/gufuz.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_c60414641914432c830311f627d2ab37.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_09b4d9194fa946339d2a8d6a0768b90c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libeganot/facing_love_addiction_free.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_4a6bb214c45946ba8c3ba0f138b01d21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dcad20-ae17-4c02-9be8-7298f9b595ee/how_to_turn_down_volume_on_adt_safewatch_pro_3000.pdfIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_efc378d44c054ac59b5a8e75fa8d1991.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/34842873070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e8813a-d7fa-405b-b268-3c717e797829/67953922018.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/lukagoxatuwegok.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/half_blood_prince_film_cast.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_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 5820 bytes
SHA-256: cf793ea78fd7a5cfa5601c610f4316f7d4e418937e589b785bc25c63ba5f7b57
font_01_sfnt_off00010276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 11344 bytes
SHA-256: 4b79f45b3855b9116b3c8d9bdb6ba99caf3f67bac3afc06a344819e5b0d517fe

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