Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f04a2d03006481…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 04:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45446033105393b6331279401f5a299a SHA-1: d8475c5049b977dd98cc503f344768f27860fa12 SHA-256: b4f04a2d030064813b16c8df1e80e323013bf8c4b1d3e61ce063b4b00ec7e479
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xezojetit.ru/aws?utm_term=the+outsider+book+review+albert+camus PDF link annotation
    • http://blankid.ru/alarma_prestige_aps997el5t3i.pdfIn PDF document text
    • https://kigotofu.weebly.com/uploads/1/3/5/3/135323523/8000921.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/puxasini.pdfIn PDF document text
    • http://reduslim-siteofficial.site/comparing_two_excel_sheets_vlookup8ezji.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/mtd_46_inch_mower_deck_parts.pdfIn PDF document text
    • http://arendagg.xyz/xesilirudewegabexdckke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381544/normal_5ffdb6a43981c.pdfIn PDF document text
    • http://laithub.pro/154451139060ogw3.pdfIn PDF document text
    • http://price-list.moscow/garmin_60csx_driver_windows_7264k0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5ff78dda6e168.pdfIn PDF document text
    • http://disozire.mygamesonline.org/fijovegenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_600a4d3cec1b9.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/toniwufegax-wunogij-xogisasisis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e5a2c3-51c4-4efd-830a-fe8d41bafca8/retozuvatotisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca4aeea-363c-4885-bfed-26f43a727b90/29797174778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3654618b-0ae6-491b-a96b-1c347eb32ffe/how_to_troubleshoot_fan_relays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2287f18d-e3eb-4855-b812-cebf2b5dccbf/tilirabujuxotebibuzowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e1cc3d-852d-40cd-9372-2cd8a851c0a3/vezelovijisekolorov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9435f2-9149-4729-a861-05e274e135b9/black_and_decker_coffee_maker_programmable_timer_instructions.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_off0000f96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96E 5484 bytes
SHA-256: a6bcb165792d5bac161f12c491c5ba4976f077fc9fe4fd1601efe9d671f2b3e7
font_01_sfnt_off00010bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 10760 bytes
SHA-256: ef3da4e8f2e82cece8c964f1d28cdda19c5e2a374fdcc87c9fc4dbe8aff388f7

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