Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0eeadd2406f073…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 21:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ceca1f60748a6ddd2dd69909cb65096d SHA-1: bc49bdf2dd4605f388fe8d3f3bf4422f06d088b1 SHA-256: af0eeadd2406f07318736b7d2c18cee2f6706400c55a2a0733e6b68977c047be
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Netgear wgr614 v5 setup'. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', along with a high ML classifier score and ClamAV detection, strongly suggests malicious intent. No scripts were extracted, but the overall structure points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=netgear+wgr614+v5+setup PDF link annotation
    • http://nuzidixiwetor.22web.org/rimuzexududuzuvaxigevavun.pdfIn PDF document text
    • http://namsinc.info/8876637793c2uj9.pdfIn PDF document text
    • http://firstreadersclub.com/battle_royale_manga_downloadq0n5s.pdfIn PDF document text
    • http://remontnatali.ru/easy_piano_music_sheet_with_lettersyqh2p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_5494d3db8404413fbaa690f399637226.pdf?index=trueIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_c8906e64dee8484abe278192543c75ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb096752-d0fa-4e2c-a93a-90f6af0ac797/bojawafizigetusibaw.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_4288a21df00648039c60eb8b651fcd53.pdf?index=trueIn PDF document text
    • http://vufuxit.epizy.com/73336515057.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/xotavudovarigebedetoresa.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_8c0f2d4878b44ab9b4ed784c714a2e41.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_60a3edfef8a141bbb20889b2e26adc7e.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_10c7d7700f284f34aaf21823ef0d2d92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2e3ec2-1a7f-4bce-88a7-b799fa686566/geotechnical_engineering_jobs_denver_area.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81836e1e-15b3-423b-949a-f825fc8c1a2e/kefavofizasulaxizefotamod.pdfIn PDF document text
    • http://puxakuxuvon.epizy.com/define_internal_users_of_accounting_information.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_2c72bb52f3844df1a9a059d72f51d933.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_a4f81fbfba3148bfa15f42adcacb9797.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_2c4f6fdc7469431e81e0051c5c984f68.pdf?index=trueIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_8d77ce251cbd4f17b95ccf052a4fb0fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00e6650-3829-476e-b2c7-8a710210209e/tudun.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/sajijebelizatejax.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_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 5492 bytes
SHA-256: 8742d161ba054260ebd0ba3c5aa6790590e7708dee304a84ae97094e3c5e34a6
font_01_sfnt_off0000fe63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 11000 bytes
SHA-256: 3505e80f00f51032f29742ad8aab11a4bc4dd901b9bb81ae27d4d121b2ddafa0

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