Malicious PDF — malware analysis report

Static analysis result for SHA-256 306818799db939fe…

MALICIOUS

PDF

76.2 KB Created: 2021-03-27 12:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 29d761c1880f3db9bdf9774dbe6af98c SHA-1: 76ce04057ca6b67f88215a8f2718c10854df1a1d SHA-256: 306818799db939fef1dfca6ce1ca7d9f18e40cf9b5e31e7162160e0704b0be35
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, potentially leading to further exploitation.

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 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.
  • 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://fokemale.ru/award?keyword=approachers+series+integrated+science+pdf+download PDF link annotation
    • http://tekeriset.iblogger.org/19385547341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368266/normal_5fc6c61b1e052.pdfIn PDF document text
    • http://difemetudanad.22web.org/lolisoparuluva.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/1776263.pdfIn PDF document text
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/fesatufasol_zositok_vasadizile_lebofak.pdfIn PDF document text
    • http://glawerry.online/can_you_cancel_a_lease_before_it_starts_quebecmtxzr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_60243c652e524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5fc60a70f03d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fe6458c8d0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_605c6989e9e8d.pdfIn PDF document text
    • http://tifowudadu.22web.org/nesasomufexisozugevo.pdfIn PDF document text
    • http://podarokinsta24.online/80462355159i8u6s.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/97409397698.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_fae2d2380d644290ad82a926bbb4114b.pdf?index=trueIn PDF document text
    • http://tesalivolanimeg.rf.gd/free_printable_homework_planner_template.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_11c9dbaa2bfa4d03a5c8e8f564b1c23b.pdf?index=trueIn PDF document text
    • http://katevafitaga.epizy.com/76323834841.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_108334af19be4230afaa2e4c9a089495.pdf?index=trueIn PDF document text
    • http://pewidaxadumo.rf.gd/why_does_my_heating_not_turn_off.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_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 5496 bytes
SHA-256: 81c6699c088213b3fa2ff5946c64dde93a4d00b1ac03f37a16081bb6783d1106
font_01_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 10980 bytes
SHA-256: 4ff165dbf9f8457a15498aecb142e91eb924e550490aa8850a281a727bde0d10

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