Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ba7445e3f36654…

MALICIOUS

PDF

65.4 KB Created: 2020-11-16 16:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5685ad9e96871c7aff8d43a39b30f4cf SHA-1: d0e7f8d1c34db3ffc0bac9eca15b86ad1c7b01b2 SHA-256: d1ba7445e3f366541b2ad9246d0630168a9a493a55b061c892a9834204e994f9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=powerpoint+style+guidelines PDF link annotation
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/2607912.pdfIn PDF document text
    • https://tirawinuzupufe.weebly.com/uploads/1/3/4/4/134445233/d9ce0b30603.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/pefidenisivolel.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/1720707.pdfIn PDF document text
    • https://tefidimigeb.weebly.com/uploads/1/3/4/3/134319466/2852276.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/f2922edf-ac01-4ac8-92f4-6bcac94d3d23/libexuvasilola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab64f03-3c78-411d-9c66-393bc6ba9682/bible_word_study_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/61359782738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc4aa55-7abd-48b4-af26-9e6455acd533/61716813630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edec331-9eea-4818-a357-eb533ca6438b/the_suite_life_on_deck_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d0b953-bc22-489c-8aac-955d276b0dbe/makeluzodiponebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1256eb-ca56-428a-bffd-aa113d21c34a/fafodiful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ad9bff-c00d-4a7f-826c-e3e0ba1383f2/street_sweeping_schedule_long_beach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f49c47d-c6e4-4eb5-8aa6-a2f74ce49c6f/34932839837.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42B 5112 bytes
SHA-256: 7e988439b45e3b1c06d029e17ca6bea69727d632a296776fa8aba2be62a4473d
font_01_sfnt_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 10312 bytes
SHA-256: 1ca1a0b27d495171136e7a327138a3c69c46c783773b89eed2fb2e0e7247851c

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