Malicious PDF — malware analysis report

Static analysis result for SHA-256 97942954d116fab8…

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 19:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d9cf8695aa11fae06a7f0e2e0069ef28 SHA-1: b63660a3a55214b496b78d8c75315fc1bc495923 SHA-256: 97942954d116fab8232b63ffb97ebc01eb2509c99233078686a569bb29e7eed9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'lnstagramcopyrightcenter.com', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'lab puppies for adoption in kansas' and 'wkhtmltopdf', indicating a potential lure for SEO spam or a phishing campaign. The presence of PDF-specific heuristics like PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, along with ClamAV detection, strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=lab+puppies+for+adoption+in+kansas PDF link annotation
    • http://lnstagramcopyrightcenter.com/fakedufasalokoseradipor4ok52.pdfIn PDF document text
    • http://reactivaperu-2020.com/7225052336905ou5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5fcecb4b82934.pdfIn PDF document text
    • http://greatholl.com/how_to_read_the_mistborn_seriesqya46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_6044639e531ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_41ac1f0f4ff449658c4c0c1f9764ecc9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xarojapi/java_programming_tutorial_free.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_6ecfdb6a0ef349eb85898e3c8da9f898.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_359140c880994889b6a5f7fd8fb49c06.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_35c1fea67bb9425bb9a77efc6857d18d.pdf?index=trueIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_e5eeb3b7ee0c44a390d52e6a05773394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefabe/25085693283.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_04964f025cd9426a82175e40b355af07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/ctet_last_date_2019_application_form_december.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_a61d31e78e3b4c3bbe87e557f77d3c07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wisuw/gukinapinonizubikudaxon.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_a62b927ade644380bd7d9e71dd0d09d4.pdf?index=trueIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_7ee1acc2cc9044378aa75494f6c00877.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/mulukorogijopamopisel.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/dubaxibalisuxewenixiligi.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/tafodol.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_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 5148 bytes
SHA-256: 6df332cd18a492ed3be95f1b341a42d135c22ac6de58217088603c49ca35aecc
font_01_sfnt_off00011105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11105 11224 bytes
SHA-256: 7f7a9ba8a7a08df9378ea384cd0b0ab2ee38f40707defad0a460682aa69ba436

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