Malicious PDF — malware analysis report

Static analysis result for SHA-256 61775de450241e11…

MALICIOUS

PDF

105.3 KB Created: 2021-02-18 10:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43cfe488b08ef08a67510f6af1dc1acd SHA-1: e70986b97bc1d22c709cc8e168f8cb3d37ca5736 SHA-256: 61775de450241e1147a48f1e6ab696afd5d02f3623a0331698f4768ec9464d60
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a known malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to direct users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+become+a+vet+tech+in+mississippi In PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/xumesir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_60288a3b3cfd5.pdfIn PDF document text
    • https://rebomavarel.weebly.com/uploads/1/3/4/8/134883959/mulekik-jutoravu-bagaguvatukova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_6001c1dabd76e.pdfIn PDF document text
    • http://com-copyrighit.com/how_to_adjust_remstar_auto_a-flex1gdd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_602be24cc1cf4.pdfIn PDF document text
    • https://wamonudikiso.weebly.com/uploads/1/3/0/7/130776885/8f3fe4cb5d3a453.pdfIn PDF document text
    • http://bufo.online/987797226161i3py.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fddf9a474af9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5ff3a922c99e6.pdfIn PDF document text
    • http://itslm.fun/dokamucdab7.pdfIn PDF document text
    • http://summerita.fun/667303433320eb13.pdfIn PDF document text
    • http://return-0.com/75347765809314e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_601e0db8af031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_601a3914513ff.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/bededuxotulapil/simujiv.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/moxuduvowo.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/78995620607.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/10208486564.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/bum_chicky_bum_bum_song.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/beginners_guide_to_seo.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/extenuating_circumstances_form_essex_uni.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_off000161ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161AE 5296 bytes
SHA-256: 17b3053fba2190adda2b35b8d7a566adfed72cdc9fc420aa81ad0a03c1373066
font_01_sfnt_off000173a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A6 10588 bytes
SHA-256: 58baa520e4cccad478d558b51ccf20186e90e1ba87b2855e1e5cc6e2cbfacae8

Open this report in the interactive analyzer, or submit your own file for analysis.