Malicious PDF — malware analysis report

Static analysis result for SHA-256 5578d1bcc0ce2b27…

MALICIOUS

PDF

79.3 KB Created: 2021-06-13 02:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 72c7509464beef04a26db4986a1bffe2 SHA-1: 6ae40a1d748a62363e1a66d211b610d5ed02f5c0 SHA-256: 5578d1bcc0ce2b277a9424017df2b53c716d8baf5677bd6c8508407604314e4d
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services and appear to be part of a link farm. The primary URL, 'https://nomylo.ru/pbw?utm_term=dj+snake+lean+on+mp3+song+download', suggests a lure for downloading media, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving 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
  • 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://nomylo.ru/pbw?utm_term=dj+snake+lean+on+mp3+song+download PDF link annotation
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/5059754.pdfIn PDF document text
    • https://zegamabifogur.weebly.com/uploads/1/3/4/6/134648685/31c2faf014.pdfIn PDF document text
    • https://detidigem.weebly.com/uploads/1/3/4/4/134491675/momanulewazek-zulip-fakuvudebu-nevarotega.pdfIn PDF document text
    • https://lamegebepezaris.weebly.com/uploads/1/3/1/4/131438642/02a2224df83c.pdfIn PDF document text
    • https://gaditefu.weebly.com/uploads/1/3/2/7/132712385/fabodaranolowi.pdfIn PDF document text
    • https://lenudigibelap.weebly.com/uploads/1/3/7/4/137499492/4dc7d.pdfIn PDF document text
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/kurad_radufizu.pdfIn PDF document text
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/7524616.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/kaferozalowajo.pdfIn PDF document text
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/4502351.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/lovebemazu_zadiperiwepuku.pdfIn PDF document text
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/6492741.pdfIn PDF document text
    • https://kobafanosige.weebly.com/uploads/1/3/4/0/134016660/zovosibusazimox.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/0576402ff52ac.pdfIn PDF document text
    • https://fudamugifotud.weebly.com/uploads/1/3/5/3/135323440/gepopapexam.pdfIn PDF document text
    • https://figeneluniw.weebly.com/uploads/1/3/4/8/134857588/tebilujelupama.pdfIn PDF document text
    • https://temuvizot.weebly.com/uploads/1/3/4/8/134856639/d4fc5629f9.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/zedopotirewa.pdfIn PDF document text
    • https://pefolasonej.weebly.com/uploads/1/3/4/9/134901659/2315092.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://gemometis.pbworks.com/w/file/fetch/144520992/mobixaxasawapusiw.pdfIn PDF document text
    • http://daladefadus.pbworks.com/w/file/fetch/144879684/comali_full_movie_in_tamil_download_in_moviesda.pdfIn PDF document text
    • http://vogivakazela.pbworks.com/f/new_telugu_movies_download_website__500__0.06__0.45__Low__1.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_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5236 bytes
SHA-256: e6ef6069645fb7970b374ae34cd14663d8be663fb885e53d3733f41ae3e37ff5
font_01_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 10772 bytes
SHA-256: 249b62812fbcc8a43b17219f59a6dc7278b5376158e95ca6a8e8ff25e8ba2626
font_02_sfnt_off0001212b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c