Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e263b0fb71b4274…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 21:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad79ca408e4fd70f2605c63559e9de2 SHA-1: d56f75958c0f1b5a39f30e642988d085fd8e8bfc SHA-256: 1e263b0fb71b4274568724c1ef6f5f6995349e7980eff922e5dfbf7669c32d41
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=fairsandfestivals.net+in+nc
    • http://kzrovk.xyz/traffic_road_game_onlinejkpum.pdf
    • http://br1.red/tuwezok9wza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pulavokaxe/dyson_dc41_change_over_hose_replacement.pdf
    • http://nosigegu.onlinewebshop.net/reasons_to_stay_alive_matt_haig_quotes.pdf
    • https://s3.amazonaws.com/libusamagowuvo/blender_2.81_tutorial.pdf
    • https://s3.amazonaws.com/roware/2426363590.pdf
    • http://bibezakomi.myartsonline.com/the_maze_runner_summary_chapters_10-20.pdf
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_2edf9b362ed540628065bfe2988f51bf.pdf?index=true
    • http://dozuxix.myartsonline.com/45818002463.pdf
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_8638d8af55a7497eba4acf97404e86c8.pdf?index=true
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_bf0b00c60c4c419dadb1401b4aa883de.pdf?index=true
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_bbc82f9b8b43429093c19c4eafc3e292.pdf?index=true
    • https://s3.amazonaws.com/wurivuve/denurokasasivosex.pdf
    • http://noroved.myartsonline.com/zetikusimifigiretume.pdf
    • https://s3.amazonaws.com/bipovoromoj/64673201509.pdf
    • https://s3.amazonaws.com/fakuguvil/79797219560.pdf
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_b495cfdac09044828ed712a115b1a95d.pdf?index=true
    • http://pigutun.myartsonline.com/ansys_workbench_training_manual.pdf
    • https://s3.amazonaws.com/megulu/mild_form_of_gastroenteritis.pdf
    • https://s3.amazonaws.com/mutirexa/37841612718.pdf
    • https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_913f5915b01a4a369cc974e92f6a9f61.pdf?index=true
    • https://s3.amazonaws.com/retisovojor/arduino_pro_mini_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d3.bin
2195f3e8e60d280e3353d2701aa4a47e92aa3af588a83a72020a7efbc0ecd3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 4740 bytes
font_01_sfnt_off000100fd.bin
83258a7a1e2b6aa984cb529ab9f72229e9310d66d20755755b09a6d7c36b1530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 10904 bytes
font_02_sfnt_off000125d2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125D2 4324 bytes

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