Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e11df7dc038483…

MALICIOUS

PDF

86.2 KB Created: 2021-01-18 00:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da38c5af13ad79b9af9ae5fcfbcb3969 SHA-1: 3124539362472125c0f1a51c937eb7225c0ad9bb SHA-256: 45e11df7dc03848320abf29e31fa4660b324b479f480e0e89344644637ccc3f2
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to potentially harmful websites. The presence of numerous embedded URLs, many hosted on disposable domains or redirector services, strongly indicates a phishing or spam campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=systems+of+equations+hands-on+activity+pdf In PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/c0744d51b225.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/1014395.pdfIn PDF document text
    • http://viwimewi.22web.org/32963602639.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/7623055.pdfIn PDF document text
    • https://bilagezapa.weebly.com/uploads/1/3/1/1/131163658/9450630698.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/dofomujupaxilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_5fbb5786e5000.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/8388725.pdfIn PDF document text
    • https://zoditasus.weebly.com/uploads/1/3/4/6/134670667/rugazuzap_delewudufepe.pdfIn PDF document text
    • https://bemewewoz.weebly.com/uploads/1/3/4/6/134639120/mekaxifigewutofe.pdfIn PDF document text
    • https://dokupikojezox.weebly.com/uploads/1/3/4/7/134740590/zejiketemupo-fukexajozo.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/9567609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_5fa237dc57f65.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/xazumaziz_wafozuzofati.pdfIn PDF document text
    • https://kevibudoja.weebly.com/uploads/1/3/0/8/130814666/gizomirisemedu_vevigefima_dakixoliriz.pdfIn PDF document text
    • https://sekiwamabo.weebly.com/uploads/1/3/4/7/134729119/9395beabc032c0.pdfIn PDF document text
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/wakekaxo_tojex_tedinawusixip_bavamumatiju.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/juposajudasidapalire.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/lusezubizexixig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukasorepej.rf.gd/bewutuvunikuzuwuxifovas.pdfIn PDF document text
    • http://jenofabejuvokag.epizy.com/black_lightning_season_2_episode_11.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/urine_culture_report_in_pregnancy.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_off000113cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 5692 bytes
SHA-256: 5bc89002ff5eb8ba414c6a9c7fbf3e2450b875267082f6d7bd726ab0c12c9b78
font_01_sfnt_off00012729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12729 10468 bytes
SHA-256: 207ace5ef479a779fb3f91a02cec74345024fd38d1e39e3e4347190f2d47a2b7