Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67ed974c8faeb3d…

MALICIOUS

PDF

93.8 KB Created: 2021-04-06 21:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 420ffff1ca957e9c8b194e86bf98dfb8 SHA-1: 42c15d490e54d817b8287cbdc962f0df2ab93ffb SHA-256: d67ed974c8faeb3dce84d9074d99f9d91c7211651d427c086c9c2ccf5428440b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://soxebez.ru/123?utm_term=date+format+oracle+sql+developer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5fe881856746c.pdfIn PDF document text
    • http://pufexob.iblogger.org/what_year_is_my_valley_pool_table.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_5ff4b79ec3a6f.pdfIn PDF document text
    • http://nagonakog.22web.org/gatilaxixogabaxipinusotoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedigosegukigif.rf.gd/internal_quality_audit_checklist_template.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_029e84e7defd41d6bdd0a1326d44cdca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/52370115933.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_101edc9ad45c4f95885e82803df66353.pdf?index=trueIn PDF document text
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_c9b31e9c629d45b594a81b1f0a9c4068.pdf?index=trueIn PDF document text
    • http://mitefarosut.rf.gd/jesus_bleibet_meine_freude_guitar.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_23de4c24a99749359261ae080e2ed8bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/wbpsc_2020_answer_key.pdfIn PDF document text
    • http://wotikuvejuf.rf.gd/judorupedabivepuvilur.pdfIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_20868a3d68984bf18ef5355111332b32.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_1248d91ed5bc49c5a1b28f23c72ef94d.pdf?index=trueIn PDF document text
    • http://gunebejisisuton.epizy.com/86746217922.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_095e99b1423444f3ba2e8a1a5de838c8.pdf?index=trueIn PDF document text
    • http://koxevopigi.epizy.com/realidades_capitulo_1b_answers_page_24.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/78496405913.pdfIn PDF document text
    • http://bevonox.epizy.com/bhimavaram_bullodu_full_movie_songs.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_off0001303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303C 5484 bytes
SHA-256: 53d0b7f91fc6fc07985df28a4879cc13a982f6b64fd9a78e302d38fed1f9cdc2
font_01_sfnt_off000142e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E4 11552 bytes
SHA-256: 391c1ba0dfc15aa94e0051c178d5bd7935e585ff7eff8b7b37dd0b347a6a2d8f

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