Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfed03e428484a69…

MALICIOUS

PDF

80.0 KB Created: 2021-04-27 02:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6928002cc202f4daa465841518846a86 SHA-1: a9730800896ce41f5be0324ec2c0b7d994036002 SHA-256: dfed03e428484a698692840ab7207c9fba77cf605d454587232df79df692ebef
66 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 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 0.9996

Heuristics 4

  • 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://xajibur.ru/strik?utm_term=what+to+do+with+old+sodastream+cylinders PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383924/normal_60572043956e6.pdfIn PDF document text
    • https://mivunibetokujix.weebly.com/uploads/1/3/1/8/131856995/7390983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_604ca30d8349c.pdfIn PDF document text
    • https://cdn.sqhk.co/takepoladev/DFgficB/voxuwebiwopol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_6005d27aa514f.pdfIn PDF document text
    • http://copyrighthelpptteam.com/gp_faberry_fanficlyvsv.pdfIn PDF document text
    • http://smotrikino.fun/777872300829irlm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_602105897fb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_6037a55017279.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/dhhLihj/here_we_go_round_the_mulberry_bush.pdfIn PDF document text
    • https://sevexuwajewedov.weebly.com/uploads/1/3/4/5/134508994/7904798.pdfIn PDF document text
    • https://cdn.sqhk.co/zamikukodef/n8tyIL4/respondent_answerer.pdfIn PDF document text
    • https://cdn.sqhk.co/sixajuzap/jchdFgg/93273260685.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/jgemhaE/46560403570.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/97a4dce3-24bf-4cf5-9828-032c8655cb3c/4431370053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587da08d-1b4b-4b51-87b8-27db82e51e1c/what_is_the_plot_of_a_little_princess.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/little_prince_montblanc_notebook.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/buzadeboleb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f7eba4-32a9-4ae2-bb12-08f334641a11/62162499883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06bb874-a4bb-4922-a43a-06daa95e701c/rii_wireless_keyboard_and_mouse_rk200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ceced0-091e-4ec9-90f1-3d79270dc3b6/28067393142.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 3352 bytes
SHA-256: ccf9fb892202b4bb2088ce8142a4053323d469e40edb26319e9635fab615566c
font_01_sfnt_off0000f813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 5388 bytes
SHA-256: 1b4e2a768ea0e32a943f8648faa7f9ba717ebbcd5286bb38d325671ca4d2c3b1
font_02_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 11188 bytes
SHA-256: 77e55768ba56870ea76b6e3bb69ab9d1715439617b568a731246f98292385574

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