Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba103f610da4a01…

MALICIOUS

PDF

77.4 KB Created: 2020-11-09 20:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2d79c52a1409aaf3e42b05dffa42a91e SHA-1: 6e48fa1537ff04fd02f24609ecec4a2bce78d516 SHA-256: 3ba103f610da4a013d86fb14fc4f43e4ba2a47d613fac96dd595340b856d40eb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the lure.

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://traffset.ru/123?keyword=minecraft+apk+pc+bedrock PDF link annotation
    • https://xutetuzaxudekit.weebly.com/uploads/1/3/4/3/134371691/d68bc5b.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/ligolamuwavexomemol.pdfIn PDF document text
    • https://xorozatu.weebly.com/uploads/1/3/4/4/134461248/gakuduvixupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wopari/core_periphery_model_strengths_and_weaknesses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b5679-4c3f-4b13-afbc-3e5611145ed0/american_girl_doll_clothes_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tesajetudivelanatiror.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/61999916560.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/75922003246.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/african_queen_names.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/lord_of_the_flies_comprehensive_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/winegopijelibidawiwilu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/buluguvej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8482e291-4076-4ac5-aecd-c39d4f326a8b/82278447082.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/a_room_of_one_s_own_virginia_woolf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b275a80e-266f-40f0-8aae-278c60b590b1/66039980959.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 5148 bytes
SHA-256: 0e3a7f7c5841647028f4eeb4e43a63cc6250eb9e2934c4769e690195838d7256
font_01_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 10964 bytes
SHA-256: 295e8d9d04a8624e0be4eb02c0c885222e343c4b1cc12c3fa4fbb94752747516
font_02_sfnt_off0001136b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136B 16060 bytes
SHA-256: 2d97eb5b8c66583654a55461b75ebc9d5954fe3bb26bfbf5761d5bfdae6bb250

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