Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3a0de1efa8bf44…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 01:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b95a9075a40e2743f5314cc0b25a1868 SHA-1: d9a49a5f3deb90337dad99c45c02a4a5ca764308 SHA-256: 5f3a0de1efa8bf442dd7b7bfa4bd5510f883687abc7a440f137296abd8e3222e
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with attempts to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=sid+meier%2527s+civilization+beyond+earth+beginners+guide PDF link annotation
    • http://jawixogu.mygamesonline.org/kiwiwuno.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/rubukig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_6044759988708.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/the_school_donald_barthelme_setting.pdfIn PDF document text
    • http://wipamete.22web.org/96160617762.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/the_difference_between_dogs_and_cats_funny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370056/normal_5fcbf9800247e.pdfIn PDF document text
    • https://lonugawewubosil.weebly.com/uploads/1/3/4/6/134627014/jezur_koxewaxi_putorobalegid.pdfIn PDF document text
    • https://dojibosuxuzepi.weebly.com/uploads/1/3/1/3/131378780/9444813.pdfIn PDF document text
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/diloxan.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/6984861.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/kedubuvamuf.pdfIn PDF document text
    • https://zadobezaja.weebly.com/uploads/1/3/0/7/130775221/6735804.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/f1d2817051a3.pdfIn PDF document text
    • https://jasoveloxera.weebly.com/uploads/1/3/5/9/135967924/lupanuxelu_xidoganulilul_lewamago.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/saromap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b292d2d3-001c-4991-b9d6-d59261827ab3/html_how_to_make_button_link.pdfIn PDF document text
    • http://jalameki.epizy.com/sijasedopikofiratu.pdfIn PDF document text
    • http://nawanoma.rf.gd/9893665503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09673654-7f3a-46c2-b594-cda6d1ab0566/gugori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e986b36-01ad-4829-aaae-5a60c50bf5cf/95279735538.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 5844 bytes
SHA-256: 57596b1b2cd6a73f268940b6573098d905a313f9328eeb746238144fd8591e40
font_01_sfnt_off0000f974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 10852 bytes
SHA-256: aa87f8a7fc3b2f27f8c643f51162c4ce64a93e1062c594a1a067b27128d85efa
font_02_sfnt_off00011ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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