Malicious PDF — malware analysis report

Static analysis result for SHA-256 be925a39ce872552…

MALICIOUS

PDF

85.2 KB Created: 2021-06-08 20:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4d71a1686654c971671c705b984347c7 SHA-1: 3de941e6be4cb1755a2ed83316cf995be03ae93e SHA-256: be925a39ce8725523b1c2e0a2d88b574c1b27b39e6571d3af6b7ee78512a7be2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pixomot.ru/pbw?utm_term=codigos+para+control+universal+isel PDF link annotation
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/sopijan-lasimazinuno-mumebim-mukiruxobojajej.pdfIn PDF document text
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/41e81d673193ce.pdfIn PDF document text
    • https://furuvisagibeveb.weebly.com/uploads/1/3/1/4/131453033/4455932.pdfIn PDF document text
    • https://didunebufanef.weebly.com/uploads/1/3/4/6/134680758/vagisede.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/juruneda.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/5a69caff0c05fc.pdfIn PDF document text
    • https://wijaxogelawatu.weebly.com/uploads/1/3/4/6/134622036/wiferap_duregopeko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_6022e3db89ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_604af1cf2ea5a.pdfIn PDF document text
    • https://jubezotezuwu.weebly.com/uploads/1/3/4/4/134476040/4838a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_600a7c305cd6c.pdfIn PDF document text
    • https://regofixaf.weebly.com/uploads/1/3/5/3/135318676/divezutenajutot_rudum.pdfIn PDF document text
    • https://vadurijale.weebly.com/uploads/1/3/4/5/134590900/xixubosinewadu-beboje-xuzovap-dajutosutap.pdfIn PDF document text
    • https://kobejepofefes.weebly.com/uploads/1/3/5/3/135317692/vetega_wuxakudebu_venurotijuzipuw_kujufuwavi.pdfIn PDF document text
    • https://xuxufagitagagi.weebly.com/uploads/1/3/0/7/130740521/2727711.pdfIn PDF document text
    • https://kivupopemuti.weebly.com/uploads/1/3/4/3/134318129/zariva-kafemamexuj-dirabulenu.pdfIn PDF document text
    • https://tevifetaz.weebly.com/uploads/1/3/4/7/134746506/sasokeder-jugabavixelet-bafezarilosemos-vefizesadijug.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/511943.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://jebodigezev.pbworks.com/f/where_can_i_donate_a_hamster.pdfIn PDF document text
    • http://jetubabup.pbworks.com/w/file/fetch/144887097/30530639917.pdfIn PDF document text
    • http://fuvotobike.pbworks.com/w/file/fetch/144776223/watch_barbie_princess_and_the_pauper_google_drive.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 5208 bytes
SHA-256: 90acd4288cb3556ca5c3b8213528f5e143dbff8e5d8373b506a356c5082dbaf5
font_02_sfnt_off000110d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 11784 bytes
SHA-256: 83a81ddb6bb0529389204cf9c948cf922de0d21a39556a221943011d51a4348b
font_03_sfnt_off0001371f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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