Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d74f9231e7d7f97…

MALICIOUS

PDF

86.0 KB Created: 2021-06-01 07:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b0b7ee573987a733d091af97967839a0 SHA-1: 83dbba722b219ccf9e25993cfb63c103f4f75dac SHA-256: 4d74f9231e7d7f9717ab58797622b0a55213356b87df6f6e79dac86a62fb54f7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://laborke.ru/pbw?utm_term=cuentos+de+valores+para+adolescentes PDF link annotation
    • https://xulisonifob.weebly.com/uploads/1/3/2/6/132695361/3525513.pdfIn PDF document text
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/vawomuravopoved.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408601/normal_601a3d4b887e3.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/1827021.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/aa371ad074af918.pdfIn PDF document text
    • https://mekekusakelume.weebly.com/uploads/1/3/0/7/130776601/kubiwejulop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_6006710608963.pdfIn PDF document text
    • https://talaxosukizarom.weebly.com/uploads/1/3/0/7/130775084/vofona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tukufidanega.pbworks.com/f/summertime_saga_latest_version_mod_apk_for_android.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/nivun.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144440721/flying_sword_of_dragon_gate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0628a575-e572-4a06-a811-f19c519f00a0/64450660485.pdfIn PDF document text
    • http://dewubuk.pbworks.com/w/file/fetch/144422817/simurere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ff3c13-a6e4-4848-8723-eec4d50aeca0/sequin_flower_girl_dress_long.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144445785/15589312209.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144431901/3110005495.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144437796/taxutowibujomem.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/usbutil_v1_02_free_download.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144416562/gta_liberty_city_stories_cheat_device_psp_6.61_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb0e050-bfa6-46ef-a14a-122fe60c287d/mefarofanematoxewobudoki.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_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 5032 bytes
SHA-256: 4af31de52f618e08f675f62bc68925ede30f534c390c518be49c7fa8f5d47b27
font_01_sfnt_off00012101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12101 12444 bytes
SHA-256: 317ac569efff04a6020e9da417480181984b48775a5bd9f7a642fa55d7678adc

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