Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c4ab52252dd083…

MALICIOUS

PDF

71.2 KB Created: 2021-03-19 05:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c018978473ddb4c69ccf88945e08cdae SHA-1: 00f48639cf74ef3ef87b0581949be01398702c63 SHA-256: 04c4ab52252dd08332134e7c750f548401fe3c5f27770c23152da1394b3f57bc
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting an attempt to distribute malicious content. The presence of a password-protected archive lure indicates a common tactic to bypass security filters. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=driver+certificado+digital+a3+certsign PDF link annotation
    • http://puwofipafemuvif.22web.org/how_to_set_vivint_thermostat.pdfIn PDF document text
    • https://vumazara.weebly.com/uploads/1/3/0/7/130738753/valonujexef.pdfIn PDF document text
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/e211c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_6015b6ebac7f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421943/normal_6008232578c89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fed17d19f086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_603ddeb4b36af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_5fe840aac172d.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/bavigike_wufesafugesobu_badili_wadijutudameru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lefemijip/atualizar_android_xiaomi_redmi_note_4x.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/bajawusebowota.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/ereading_worksheets_grade_6.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_691b7bf69e0c49bc9051dea17bf64f0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/1996_ford_ranger_led_headlights.pdfIn PDF document text
    • http://todazanimidut.epizy.com/jagidul.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/how_to_break_a_marriage_curse.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/wufuwerufodogupojekepaj.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/35521317808.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_3527850edf614b56bfdb1ee205fcc82c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/71918328599.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/risateputemexus.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_off0000d56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56B 5412 bytes
SHA-256: db898a9e852b60516193d6b717fba6addb13f7d5b2399a235826d8edc0128129
font_01_sfnt_off0000e7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 11948 bytes
SHA-256: 8b130133ea9e77720f75fbb375f814a0e93360cfeb982de8264868efb185b562

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