Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8f31893cfce5fc…

MALICIOUS

PDF

140.7 KB Created: 2021-03-20 15:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7cdeb19b28ea0d14b7df7570e680e89a SHA-1: 01e53b07b2698db2bf5004e42ab7cd8895edc44c SHA-256: dd8f31893cfce5fc6318b9ef3e0d84ef392641225a6be9ddb9c6bd821a44e487
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized document. The PDF contains a large number of external links, characteristic of a link farm, designed to obscure the primary malicious URL. The document body, though heavily obfuscated, suggests a deceptive title related to data visualization, likely a lure to direct users to the malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pelibifir.ru/strik?utm_term=plt+scatter+size+legend PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405181/normal_5fde6c3949541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5fccb2342c5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_602e1de620fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6015e3b41a7eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5ffe83999c1a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449014/normal_5fc84484eefb5.pdfIn PDF document text
    • http://movivulubelis.22web.org/sex_drugs_disasters_and_the_extinction_of_dinosaurs.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/kadambari_video_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393901/normal_5ff46d62327e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_6048befa9ef86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_5fd2fcff9476b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowivopikuzud.epizy.com/guardian_quick_crossword_answers_15010.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/how_to_install_realtek_driver.pdfIn PDF document text
    • http://bagirisuteladog.rf.gd/assets_and_liabilities_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/27533481111.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/73673688921.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/ubuntu_12._04_desktop_free.pdfIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_26534feb66c64ea4922cfe4073f1bfc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/wuthering_heights_questions_and_answers.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_6b13b88df72f4d8e93f7141e18dea743.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/netflix_hack_apk_para_pc.pdfIn PDF document text
    • http://xivixevowiwawe.rf.gd/88721257968.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 72704 bytes
SHA-256: 5027ede2f5ba5de3ba741a50ed116c5f511fdd442dd8de154796755ccfe0022b
font_01_sfnt_off0001d3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3B6 5160 bytes
SHA-256: 8b84d87dfdbe5b8ef7deab997c365e3cdb7a3f2aa312ad14d1c1dfb841b0c5ab
font_02_sfnt_off0001e555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E555 12676 bytes
SHA-256: 7fb3bed7b0165ea3bbca5835b732fd817c9fdf1c7d0bd11757d761833205dba3
font_03_sfnt_off00020fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FCD 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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