Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c253735e8e5ccfa…

MALICIOUS

PDF

70.6 KB Created: 2020-11-12 14:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5c5c416187bc41cb3bbb136f5864841e SHA-1: d258533a54a91ac5ed999c1a8aecd51450c6b23b SHA-256: 1c253735e8e5ccfa71db7df29715fb9f407bbba2d04df6e640dd5b886f1f9306
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 0.9997

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://traffine.ru/123?utm_term=cocktail+party+effect+ap+psychology PDF link annotation
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/winawurugabiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5f9c38357755b.pdfIn PDF document text
    • https://suxaposalepet.weebly.com/uploads/1/3/4/6/134677753/lifuxivabojowogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f892102776e5.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/f9ae7d7265bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/498e276c-7e0c-4f4e-be9a-739ad1609ed5/fantasy_life_warcraft_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a80928-c180-4c31-a9f4-221aadf3318a/world_herbal_encyclopedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139accfd-bd01-4ea2-abd4-cdfb38894408/visowurajibanalog.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/cardiology_explained_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ef78d4-f3ea-4423-bc4a-2824672926f9/23777993754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6850c9-14c3-4d8d-a9fd-809fd143acb4/duwokegamototeg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82A 5148 bytes
SHA-256: 4843b97ee43078405d686c21d3f22aa48a32d148d95dfa006f6c3172f9bda35f
font_01_sfnt_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 11032 bytes
SHA-256: 9f47c23f36935148318e6d77d77c657a53965ad193a95123ea6848273749ec10
font_02_sfnt_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.