Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70bcfd5530fbc37…

MALICIOUS

PDF

76.2 KB Created: 2021-02-14 05:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d1ffbf16feff41e69a7c2719c652df3 SHA-1: 3156698b0354f8a0b688376a059dd03657072602 SHA-256: d70bcfd5530fbc37a3215d63f4128f937c3c5848a6326bac917b8674443ee51e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

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
  • 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.
  • 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/aws?utm_term=free+letterhead+template+microsoft+word+publisher PDF link annotation
    • http://dimax-matrasy.ru/keguwuxapafid9i65.pdfIn PDF document text
    • http://yognat.space/34546258000lqcq1.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/fhhQrDu/busuwegiwasogu.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/24133.pdfIn PDF document text
    • http://on24-system.club/slope_distance_and_midpoint_worksheet1v7pc.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/530d4dbd.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/89374b8cc.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/xipavam.pdfIn PDF document text
    • https://wujadadi.weebly.com/uploads/1/3/1/0/131070572/nemebarimegija.pdfIn PDF document text
    • https://wekisakalew.weebly.com/uploads/1/3/4/6/134617168/adfd4f93b.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/hiRTje9/sanofosobuzoxasosovatizes.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/2698348.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jbHjbjI/94504285422.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/OjjijYT/viwewusaxalanixezaneles.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/9513308.pdfIn PDF document text
    • https://wezisewego.weebly.com/uploads/1/3/5/3/135342704/vagiparadu-masewuza-zitopib.pdfIn PDF document text
    • https://farunigi.weebly.com/uploads/1/3/4/7/134716297/0a519375b.pdfIn PDF document text
    • http://rrrrkkkkk.space/letter_writing_format_for_school_principalhomdw.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
    • http://pewusufep.epizy.com/falovajaxonukor.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_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 5360 bytes
SHA-256: 3934bb6b6f574c93b835d3bf5d24edf6447f9f2f4b82bbe1c3c61c9ba6069d5b
font_01_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 10400 bytes
SHA-256: f15c92107c268631ab69d08550b92a7f33800cb61a9f8dfc5ef0ef5285126b65
font_02_sfnt_off00011520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11520 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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