Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7d2356725d11ea…

MALICIOUS

PDF

79.5 KB Created: 2021-03-08 12:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baf6d07337d0a58e6a2c82e59f135da1 SHA-1: 221c46e8f407accee16839c0859115724c2522c6 SHA-256: 9d7d2356725d11eab0aa7732e9af595ccb024d4108454d6a6b3a9d97fafcc6b0
196 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 point to suspicious or unknown domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/123?utm_term=smokers+palate+case+report
    • https://bedapidipofawif.weebly.com/uploads/1/3/2/7/132711979/da7db2684ec3f.pdf
    • https://niduzipotobumam.weebly.com/uploads/1/3/6/0/136054567/1033235.pdf
    • http://life-news.tech/manovugevurorigomhdm.pdf
    • http://de-bewertung-id2842384.icu/eat_fit_meal_plan_bewertungoud69.pdf
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/570369.pdf
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/wemasimivuzuni-gerugoze.pdf
    • http://mobutadaxez.medianewsonline.com/vewevi.pdf
    • http://help-service-support.com/filmywap_2016_bollywood_movies_full_hdy97u6.pdf
    • http://lnstagram-support.live/common_core_math_worksheets_division_of_fractionsz8ymx.pdf
    • http://fudoviwil.mywebcommunity.org/2019_lexus_es_300_hybrid_specs.pdf
    • http://gedatidigog.sportsontheweb.net/isyoung_automatic_pet_feeder_instructions.pdf
    • http://getallcreditscores.info/41005536185p5m9t.pdf
    • http://nunobuzipame.medianewsonline.com/togubogobogutusibu.pdf
    • http://ruvujagefeko.mygamesonline.org/craftsman_18_chainsaw_parts_list.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_d3f58b18cd524b9ba903178939687826.pdf?index=true
    • http://dusameferadulo.onlinewebshop.net/nenunirab.pdf
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_5b41fe5a4c1c43b3b831251519e8e981.pdf?index=true
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_2fed202c36064ec5889cb848cc8e8178.pdf?index=true
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_8484c2a6f4094d219c4a438df0558fab.pdf?index=true
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_e17d014615cd4aa3b677da92cda8d9e7.pdf?index=true
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_a810b0a770cc4145aa4963d670c3f3d4.pdf?index=true
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_2ddae4cc082243f7a013bf552712100f.pdf?index=true
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_736fa7e1f0a3490da6522bd8c0c2d9c5.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e2.bin
4a23e51bab7f7060bd6d0de695062a8076cacd1521aa21bd756543142b9c5af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 5248 bytes
font_01_sfnt_off00010ba1.bin
4229cbee00bd382f03f4185cea7128a23ee0ab86ca3ebb1afea76a478a4f9223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA1 11352 bytes

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