Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2556c7f3e04ed9…

MALICIOUS

PDF

83.5 KB Created: 2021-04-28 23:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddaa898892753dd38b370c894d58253c SHA-1: b451f8079ce8c0fc401979cdd3243fc98f7c8764 SHA-256: 2d2556c7f3e04ed95cf79c1033096ddc51742a2176a6467b0771e86bc0e126ee
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 0.9992

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://jacksth.ru/strik?utm_term=the+boy+who+harnessed+the+wind+read+aloud+picture+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467945/normal_606ba4456ce6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_60318fcda98d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6032d602bb67e.pdfIn PDF document text
    • https://cdn.sqhk.co/xaderipamuva/op5gdib/weveme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_60691e627d05e.pdfIn PDF document text
    • https://cdn.sqhk.co/sadoburola/Tqhb6Im/tejozamefopebupirow.pdfIn PDF document text
    • https://cdn.sqhk.co/jujirepak/6rjfFgd/aplikasi_google_assistant_go.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5fc65a0e05149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lakadutof/44539260613.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/tamujimiwogufej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e48071b-ea39-4045-afdc-27f362a7a032/diwivewowunesizoluwexu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/piramizujibabulagoruse.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/mazoruv.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/kenmore_600_series_dryer_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/calibri_truetype_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a72c0b7-15c2-408f-8967-3dd487d7cce0/how_many_calories_are_in_a_medium_popcorn_chicken_from_sonic.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/the_druidry_handbook.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_c84788b6bb1942d788baad7a42252152.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4215c49c-38c9-4477-896d-6ad223d80e28/what_is_the_meaning_of_kubla_khan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac362ee9-8ea4-4f01-9f81-d5a2da17d27a/honda_pilot_brake_replacement_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f6fe48-3f91-4374-b76e-7ac83c404dc7/vba_tutorial_access_2016.pdfIn PDF document text
    • https://22e44a25-5b44-49ab-8bd1-9de78d2943b2.filesusr.com/ugd/cce535_b937780b22ab4de2977f27a96bc9c6ee.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_e5d536fb45f746008a452ae00f14a664.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 5388 bytes
SHA-256: 3acf8d59fd3c851cf4654faf11f6591a32090b79fb92c8e68dabe8b3adb4fd9d
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 10424 bytes
SHA-256: 3777ae2454f3fa9c8948e86338b8b9bc3b71bca2332a4d6fc0b0be0062757cec
font_02_sfnt_off0001300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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