Malicious PDF — malware analysis report

Static analysis result for SHA-256 569e6089876d47d3…

MALICIOUS

PDF

90.0 KB Created: 2021-04-15 19:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f07b0aeb92910c9f976f8372cb95f0c1 SHA-1: 540e7b0c0a4c3e361a8d8fa5a95fa1bfe1c295fc SHA-256: 569e6089876d47d3718ad7f549ce57ad26d67d2fbf4a45aeb6d91d7fed6b135d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. One of the primary links, 'https://resalured.ru/strik?utm_term=gre+quant+score+chart', suggests a malicious intent, possibly for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=gre+quant+score+chart PDF link annotation
    • http://lefegowoxivi.iblogger.org/73766077058.pdfIn PDF document text
    • http://kexevosizamem.iblogger.org/bifuwotep.pdfIn PDF document text
    • https://cdn.sqhk.co/rolaravez/gghihbn/free_robux_loto_2020_mod_apk_unlimited_gems.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/geBpLib/11705235373.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/Ijbiddo/46494101412.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_b135aff074d34c19a2402ae22e23eb10.pdf?index=trueIn PDF document text
    • http://zatugawaxevi.rf.gd/61109669212.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_396a230c92da442482971eb4372cea7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midipes/95722714531.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/povuwubudusigetuvuzivo.pdfIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_748d0a9f87c547df81360412bebfb7fc.pdf?index=trueIn PDF document text
    • http://ximusurugonis.epizy.com/apset_model_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/ruvitupifenenopovufap.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/20615393970.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_823dd94faa634164899dd67189727989.pdf?index=trueIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_77021acdc6744142a07e7eb0b4db9753.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/bixolon_srp-_350plusii_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/boxer_service_manual.pdfIn PDF document text
    • https://681956c7-2c57-495f-b996-d04b50c745b0.filesusr.com/ugd/907d98_1947c27736064af39de1b223214775d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/24760874835.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_off00012179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12179 5012 bytes
SHA-256: 45ea55ef2d72176676ccf1cc852f46ca9f759775d38282acee88b22ca83030ce
font_01_sfnt_off00013285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13285 11584 bytes
SHA-256: 2790ed2d40d2536056a4c9972f950afec2820d10e905bd678bfbadf160fa66e5

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