Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5ba11c5f4a7342…

MALICIOUS

PDF

69.1 KB Created: 2020-11-22 08:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 07b7b578bb49af872602d14bccc3861e SHA-1: 9110eabf688d59a3f6a27d6f314799b5287daacb SHA-256: 8d5ba11c5f4a734292dfa6f197f8d4ee8b5341b759232023de8b2d75592aab60
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-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://trafficel.ru/123?utm_term=dinosaur+state+park+ct+reviews PDF link annotation
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/babesipaxuvujemefuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8f2693769c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_5fb9fe121d81b.pdfIn PDF document text
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/971f2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f8f59077a91f.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/vetamedisoz/bizak.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/debap.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/38880760473.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sofavefizuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/gelatevopumesukijow.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/73884878599.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/81989771857.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_off0000c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC915 5112 bytes
SHA-256: 3f9fe172a6da611e7a9b1153d24a5bf64677322f876cd69a6d51ef07db380109
font_01_sfnt_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 10856 bytes
SHA-256: 90679ac7c527b61f92e9acbc62c3cc689fb27c4ea0823c3023f04a92b351475c

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