Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b3187a4052b1a9…

MALICIOUS

PDF

75.8 KB Created: 2021-03-18 16:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cde30da38230df60ea90af9fa2b848f3 SHA-1: 2b4d323f8d1da4fc0eef77e74df52e22ceec1042 SHA-256: 59b3187a4052b1a9add0c41271a9a248a655330b21a16c7cf93dc23d904d2c4f
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be an SEO redirector. This suggests an attempt to direct users to malicious content, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/wix?keyword=armour+games+unblocked PDF link annotation
    • http://jonebukusopovet.mygamesonline.org/the_collector_book_summary.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/bazogakurudelebizobejos.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/21f8e9b3b6.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/nlt_bible_online_shopping.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/9780087.pdfIn PDF document text
    • https://pupikitonusu.weebly.com/uploads/1/3/5/3/135301263/a8861a06a8.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/711018.pdfIn PDF document text
    • https://vinokiwofexuge.weebly.com/uploads/1/3/6/0/136095936/830760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazixipame/balache_baap_brahmachari_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/54204054190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17413ab9-cdd7-478b-b3d4-b891bff7b3b0/5495699279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/798301c3-64dc-4b00-8862-113ba36e4ea2/hp_officejet_4500_ink_cartridge_901_refill.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/79207643316.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/transformers_bumblebee_movie_sequel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924b41e7-0dbd-4d76-8c20-b3ddca80e4f3/14444972183.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/ganetiba.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/acrobat_dc_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/rowakifebulufexalodaza.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/188205915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6eb500-7a34-4387-90ce-6c4a43e8e781/do_wireless_mice_use_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/gmail_your_data.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/stock_market_veterans_day_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/70149247639.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_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5452 bytes
SHA-256: d592d447d0f42aa44677f1d81279fd48478a0582aa675d19d6f163a2ea0b0616
font_01_sfnt_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 10568 bytes
SHA-256: 086ea46d4fa63bf752256d764a10b12e70672d0a710270b581bf08668062a4e1