Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d84d8ce8ad89746…

MALICIOUS

PDF

77.8 KB Created: 2021-05-25 13:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 55434a17d2d52c3e7ad475109d57f287 SHA-1: 175628673000ec4d834784b0ffccbb2fd4e35cb6 SHA-256: 5d84d8ce8ad89746bca72bb05eee17d0021fb33cb376fa34ae67e3ab250782af
156 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 0.9996

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 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.
  • 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://maypoin.ru/strik?utm_term=how+to+set+up+fit+tech+watch PDF link annotation
    • https://xaviwemegegel.weebly.com/uploads/1/3/4/8/134859007/878761.pdfIn PDF document text
    • https://tusosalowikos.weebly.com/uploads/1/3/1/4/131453146/xebomoluweba-jubidopuwoto.pdfIn PDF document text
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/4178871.pdfIn PDF document text
    • https://teroxomiguwadi.weebly.com/uploads/1/3/1/3/131380052/6268501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_604d20cb0b883.pdfIn PDF document text
    • https://dikosunasalimob.weebly.com/uploads/1/3/4/3/134363034/1764783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465255/normal_600172957593c.pdfIn PDF document text
    • https://dukezowe.weebly.com/uploads/1/3/4/6/134602160/cfa83e093e3c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_601d794425185.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/0cc6adfe3c908e.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/xagaw.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/b4adfed3-30f3-420e-a6a0-137f5d2dc1e7/julius_caesar_play_act_1_scene_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5bfc7f-73ad-4f32-a8b6-308e1b6f2ee7/psych_statistics_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/free_car_coloring_pages_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/fegitanewapawutukixope.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/nc_dmv_drivers_license_change_of_address.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/isosceles_triangle_worksheet_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/potivivazalitipivegoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/hd_wallpapers_1080p_for_android_phone_mahadev.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/vavoluwuzilegezil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5b4cf2-d6ad-4bc2-a0fc-16ef3413b53e/exercicios_de_orao_subordinada_adverbial_com_gabarito_9_ano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ab1ae0-c691-47ce-94f5-a8257ba4fff9/33810959619.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_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 5028 bytes
SHA-256: 9a3bfd21a7eafaf47c4af90b256a91075637f4505eb6be47e94bdcdf67bba951
font_01_sfnt_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 11628 bytes
SHA-256: 7a1d6969ed61378f2338e015a40f21b88ccc95d95e6c5f6fdf1d7e01adae294f

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