Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50630d1e1c61154…

MALICIOUS

PDF

74.2 KB Created: 2020-12-27 11:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 76ed9a82d7459d3b6e45fd71733c1713 SHA-1: 2ee728ed3020a34679eaf5899dca83db991cdb7d SHA-256: e50630d1e1c61154872f798f1daa237644bc437f1119e69fc1577884e15d8804
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting services and redirectors, indicating a link farm designed to distribute traffic. One critical heuristic firing identified a link to known malicious redirector infrastructure. While no scripts were extracted, the structure and URL distribution strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?utm_term=dokkan+android+category+tier In PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/752345.pdfIn PDF document text
    • https://jirafaribov.weebly.com/uploads/1/3/4/5/134599686/198981.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/64c0d64697e19b.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/bofiko_wuserawojavu.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/rumagafelexana_juvirozoxepudu_mopozenurop_nenalunebepaka.pdfIn PDF document text
    • https://jidukuroji.weebly.com/uploads/1/3/4/0/134013204/vitawobir-dojufomizi.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/3c42271300ef.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/91a7be3f-b88b-474a-8d5a-179e3aa59939/tufonajox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b680417c-3b03-4307-9f26-ffb9a368e4ab/whats_faster_sound_or_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb6c0e1-534d-4892-b1d2-5cfa4f188a76/2534987754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c392fa1-c662-459c-95e1-b72522ef1517/kegogagovorelugezagan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c849ff60-d0da-4779-b653-f3520a45f76f/38536911735.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_off0000d6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F5 4848 bytes
SHA-256: 1a92d4466427b30603adbdcb7b830c94563368aa489129aad612a3a9f167dec7
font_01_sfnt_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 11524 bytes
SHA-256: 1d3ad9cacd6817313ed39492757c8f4698d0cfc6c4c0c8a2de88e6ce1e46315c
font_02_sfnt_off00010e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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