Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bdee07ed2eecd6…

MALICIOUS

PDF

75.0 KB Created: 2020-11-23 06:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1fc71ebd87bc8880c1ca061dba26c4df SHA-1: d0bf96eb8e6df9aa68f264264f13a4b80235acab SHA-256: 56bdee07ed2eecd6f2f356e15c9eeab774292bd5008dd881b2c509a78037981c
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://traffset.ru/aws?utm_term=seismic+performance+of+stone+masonry+buildings PDF link annotation
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/gosox.pdfIn PDF document text
    • https://wofuzokekaxan.weebly.com/uploads/1/3/4/4/134465278/1952269.pdfIn PDF document text
    • https://ruzipirufevet.weebly.com/uploads/1/3/4/6/134667542/0ddc9a7acfb5daf.pdfIn PDF document text
    • https://padazuvotoj.weebly.com/uploads/1/3/4/6/134687326/4116445.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/valewipe.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/0bb4eba2-eccb-4928-927c-a6e6f86518f6/xaratigasuponovaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c66d3db-ac91-44f6-9e43-5cd016c91a51/83257761624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4727b3d1-f87c-47ca-bdf2-76877119d2c5/77973985977.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/best_bollywood_movies_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84710c96-3107-4c72-a9aa-07445df08eb4/fewuwukibakipilosap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ee6ec6-b12f-407f-a60f-256b37ecb0f1/sibawoken.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_off0000d130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD130 5820 bytes
SHA-256: 34eedbe36a9ce82c1031b3fe5f0717162bfc9a5ec8879117435846a0d3741eea
font_01_sfnt_off0000e4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 11092 bytes
SHA-256: 2b19a145628d15ec20a6263ee0c9b781cec1c5cd6edc2209366be79eb01ee672
font_02_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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