Malicious PDF — malware analysis report

Static analysis result for SHA-256 953077d0e3286748…

MALICIOUS

PDF

92.5 KB Created: 2021-05-11 02:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: da2e6df542f22f302b180087b739be95 SHA-1: 29260259a1dc6d7f0a3f08ad161d09845d85ceea SHA-256: 953077d0e3286748e07d0aee5e6f7019317e1bf200ce223380b0a7c896b32004
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are designed to mimic search engine results for common queries, such as 'why does my dyson brush stopped turning'. This technique is often used to drive traffic to malicious websites or to host phishing content. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely related to phishing or link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=why+does+my+dyson+brush+stopped+turning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393631/normal_6009879c7d6ae.pdfIn PDF document text
    • http://soinjaga.ru/gokixodovadiwopayioa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490746/normal_600dfea0ea1a7.pdfIn PDF document text
    • http://foodguideblog.com/bootstrap_alerts_formsaqbz9.pdfIn PDF document text
    • http://save50.pro/votazatezemusovovapizafnu42q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_60471d5b768ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_a68431e83c494497af9b9c9ebaae9a68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/7915993632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3958684e-f3bd-40f1-ad63-f5cc5384c727/how_much_does_scooter_service_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/85048944050.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/nobarowowetezudakigobeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed7e94d-3288-45df-8f32-99a8f7e07e71/flowers_for_algernon_quotes_miss_kinnian.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_9961e244ba444e7e86df4ab052fa1108.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/jafotuwosale.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/sakubiwuvejidami.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/bepejezidewuzokapususu.pdfIn PDF document text
    • https://f414df59-d0c5-412c-8277-160bd92acc6e.filesusr.com/ugd/055bb3_17b7b86545a546d9b57724ac73022651.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/baby_bjorn_bassinet_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B82 5268 bytes
SHA-256: da16faa45b96183176d479ef3d60c969289b2b62dca8e1c76283a1e818c43d55
font_01_sfnt_off00012d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D50 12212 bytes
SHA-256: f375379ff0234aee7b77b3fe3e458bf76ea79c0012897d47f07b29a07dedb1c0
font_02_sfnt_off000156d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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