Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd20ec2b0c908c4…

MALICIOUS

PDF

76.4 KB Created: 2021-03-17 01:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc873e7083e484c40aa98fe7363dd58b SHA-1: 14cc1539a3db7456483de3ddf59d9f78869601ab SHA-256: dfd20ec2b0c908c4c698b0d43d49717a1f591d7ed6f4dbd5ed68ef95d427e582
186 Risk Score

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 0.9991

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://soxebez.ru/wix?keyword=north+country+elementary+bell+schedule PDF link annotation
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/derom-rabakibibagunol-kolusig-nujasug.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/towopubewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450045/normal_5fddcb19d8949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_60330fc1739fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_6046ada456fcc.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/abad01cfbd23c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_6003392f4d4d2.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/princess_diaries_volume_10.pdfIn PDF document text
    • https://bazusatibewin.weebly.com/uploads/1/3/4/3/134374280/796381.pdfIn PDF document text
    • https://rojanekawuveruj.weebly.com/uploads/1/3/1/3/131380666/vopanufiwafogo.pdfIn PDF document text
    • https://bafipiwefewojex.weebly.com/uploads/1/3/4/5/134576197/6503546.pdfIn PDF document text
    • https://vigelabed.weebly.com/uploads/1/3/4/3/134368569/kukotepojizimon.pdfIn PDF document text
    • https://derikuboxema.weebly.com/uploads/1/3/0/7/130776504/xonilajojedozexijap.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/d6f1125c0a28720.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/2835cb5e-dab8-447c-b536-19c0536d7d0b/98827897780.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/prodigy_movie_2019_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950789b2-5900-4d52-8587-339fb5127b75/around_the_world_in_80_days_cartoon_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/lake_bled_slovenia_tourist_information.pdfIn PDF document text
    • http://fazatela.myartsonline.com/boy_scout_popcorn_order_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69da95dd-7174-4a81-ad73-1d6708135914/gajotudevupag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c73c9bf-3988-4b4d-8a98-6bada454bfe8/samutosigipojolemetunarut.pdfIn PDF document text
    • http://tediguku.atwebpages.com/zuxusawizifubol.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/olympus_om-2s_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ccdad2-430a-49dd-92ea-90e97e12915a/eight_limbs_of_yoga_tree.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_off0000ee4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4E 5392 bytes
SHA-256: de62c53acf0c896d2d5022ef56f5ceb639c60d2f397d46cb24fe0f7bc0a2f3c7
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10476 bytes
SHA-256: f7c8934b89baeb1bad5963f6b3b5255781d644e194d7dc1b1818982577ef64ac