Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cce123e2b5a7a4…

MALICIOUS

PDF

67.5 KB Created: 2020-11-20 09:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 40e5c981a6aed5709fba70e2e0d74194 SHA-1: 9b95f56794217298fda62dcf908c5533f8881e1f SHA-256: 38cce123e2b5a7a44ad4e63cb27c8fd109835cc21a2d62b3ce7252987dab0488
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-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://trafficel.ru/strik?utm_term=funciones+trigonometricas+circulo+unitario+pdf PDF link annotation
    • https://sadodirovi.weebly.com/uploads/1/3/4/8/134888529/7954516.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/vovopafubipu/rapikofelamuraleguvugolex.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/storey_s_guide_to_raising_rabbits.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/takawavinerowos.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/coeliac_disease.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d173740-1fcb-43a8-9319-ee10d8e16fb2/50371838001.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/how_to_decrypt_an_encrypted_cache_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bb8f41-3a2e-4dfa-981e-6a734ac654f5/kegemexatazifa.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/silele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9494f50e-f3e7-435c-95d1-c19d4249edfd/welonulup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f9c6d0-1b97-40f2-9d5a-e70ca810efba/61058841414.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/anatomy_physiology_of_eye.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/beaded_bracelets_for_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f88182-4189-4024-a263-696cb1ffadf2/nikukuzojavoxupetosuka.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 5432 bytes
SHA-256: 84fb1ba18738d3ee5ee4c93caf58beaff1c21340944378ecb795c51a4aedb4b8
font_01_sfnt_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 10864 bytes
SHA-256: a67e2cb8170d425db0f2b89a0b7487ccd642e013b72f52ac370c60785c281bff

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