Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e72468053f7d93…

MALICIOUS

PDF

73.7 KB Created: 2020-11-13 10:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c435573869ccb6697c1e0d2d5ef4c320 SHA-1: bf9008c9f1397ffe5243c48c9e082f25c8eccfa6 SHA-256: 50e72468053f7d93c8207982d3e431265e0ca6af4e2dad58c2903e7711ad2db6
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=pewdiepie+legend+of+the+brofist+how+to+unlock+duck PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fa24e0f1ac9e.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/3822842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/assamese_language_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f32eac-062e-43c8-9a47-9e8b9d15810d/doterra_oils_for_dogs.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/el_presente_simple_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/fexepid.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/todarepegabuvomokuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/lorizobivigamub.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/my_state_history_com_louisiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9979e77d-79d7-4bda-9cfa-a76fdc06f011/chemistry_olympiad_2019_examiners_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/one_letter_words_in_japanese.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5E 5504 bytes
SHA-256: 4a4f75523816444f9927b26209c33d561202169f4b1d5e53d980bb2cb3f7a632
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 8976 bytes
SHA-256: 7e98081f44ff9be21f2be21d17426fa35b07cfbadd26ac3f6cbb691f5ce60abc
font_02_sfnt_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 11796 bytes
SHA-256: 0d0372e63e01905479c5f2a677f2483b4529a26ffae4e10f4c687cd4cd068f02

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