Malicious PDF — malware analysis report

Static analysis result for SHA-256 450123f0fbecfacb…

MALICIOUS

PDF

67.8 KB Created: 2020-11-14 10:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 36c76cdb382c430743ed27d17ae1e466 SHA-1: 91184adc58e33d886975f388b9be6e0511b638bf SHA-256: 450123f0fbecfacbfa1674fff6cd5dd8e9f15355813d3359cefcf87a8fe56d47
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-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.
  • 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=fishing+reports+freeport+texas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8f624ca0ce6.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/fovuzazoxeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f9be7e2591da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_5fab268f14af3.pdfIn PDF document text
    • https://wigemixez.weebly.com/uploads/1/3/4/2/134265991/08d387a1c6e8bce.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/91468c0e-2f74-45ff-9cdb-9164e84ec635/giga_works_g500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a5f83f-f827-4ad5-b2ba-1e10ed20c705/9075065538.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/turuveleragavupoleje.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/1991_topps_baseball_cards_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e6eaf1-c054-46c4-b0cb-4386f2fa467e/54891526049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a209f5-9a0e-4093-805f-a44c9b1801be/ecuador_vs_uruguay_en_vivo_copa_america.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/4189513616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bdcebe-2218-418e-b70e-08fa99c6103f/zalijujupilosatuboga.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/95899561298.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/85156177538.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_off0000cb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB90 5156 bytes
SHA-256: fd263ae39b2269682e66bac884b8e805857906bb2818aa840f6db8402ad5a797
font_01_sfnt_off0000dd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD23 10496 bytes
SHA-256: c47ce6f1d8557e6120336f7899d85586f6e1e4c6efe0cf89fe3d4f4f00c7dbe4

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