Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f823b1113509510…

MALICIOUS

PDF

66.1 KB Created: 2021-02-14 01:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36178fb7b571a7ba63335d02a2874732 SHA-1: 2aa24bb9905cbb0941ab1204314b6be54d574e92 SHA-256: 1f823b111350951061a7dc816c60ba3d97406f4d397e7dba78e1bf5af14c78b6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, indicating a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a common tactic of using documents to redirect users to compromised or malicious web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=super+bass+probox+15+l7 PDF link annotation
    • https://cdn.sqhk.co/wufevinek/ejcZgg8/yugioh_gx_all_monsters.pdfIn PDF document text
    • http://gajozemexip.22web.org/lista_de_alimentos_con_fibra_soluble.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462036/normal_5ff76b209e8bc.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/Fgh6gg1/video_calling_website_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/j2hhvTJ/dynamo_sensitivity_for_pubg_mobile_emulator.pdfIn PDF document text
    • http://gufosizikok.22web.org/pepupoputoxuwedoxidefe.pdfIn PDF document text
    • https://gurelupukuji.weebly.com/uploads/1/3/0/7/130775622/154707172470.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/nitirew/android_studio_apk_export.pdfIn PDF document text
    • http://tokiziguvavu.rf.gd/kiwifuzokukasepupap.pdfIn PDF document text
    • http://xotepugiz.rf.gd/economics_gce_2019_question_and_answer.pdfIn PDF document text
    • http://vofiwevo.epizy.com/guiders_academy_placements.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/puzzles_with_answers_in_tamil.pdfIn PDF document text
    • http://midelex.epizy.com/blender_2._79_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/90223066479.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/bidapalokezozibe.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_off0000c676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC676 5380 bytes
SHA-256: 2687de5a6651f4b8d82efb0621428f8f000727e11f077aa3ad9b51c133f0a07f
font_01_sfnt_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 10184 bytes
SHA-256: 4d2e22f1b178be444eea97444d5cd0515e6a30d1185f0573665e86bc5164aed2

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