Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee0eb7c221ca526…

MALICIOUS

PDF

78.4 KB Created: 2021-04-21 14:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b176a9db9eade5d4142f9b41ee116ca SHA-1: da6c506ddc21ab5299fb75670bec1a0e3e25252a SHA-256: dee0eb7c221ca526853efff7ffec5b0cfcd4ce526838329be957ad02e2687fa3
186 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 0.9998

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://jumiwimov.ru/strik?utm_term=review+of+greenworks+snow+thrower PDF link annotation
    • http://nesobaka9.xyz/si_no_te_gusta_como_soy_ya_tengo_a_d0pygo.pdfIn PDF document text
    • http://paksorond.xyz/46157505554kw4xk.pdfIn PDF document text
    • http://bluebadgeapproval.com/chore_chore_mastuto_bhai_movie_hd6ix1x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fee15d470ecb.pdfIn PDF document text
    • http://blu-ital.space/63251356768h74f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_ec33198fe74d4fe8adec024cac0087e0.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_d571b33f22c64e5da8483b131ed0e05c.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_c5bbe7f64ce9480a9af39693f879c00c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/207c02b9-4cbc-4eb7-84d5-795e825241ce/14805406819.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_f433545b6b3747c3b8e80e38ba2e2436.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54731288-f5a5-4be0-89a2-5ab6dad1e403/16244679816.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_035946dcfc894feeb0cedec673ada0e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb2a664-328a-4e5a-b322-9eb1b0ee0b1e/44174271805.pdfIn PDF document text
    • http://ragipop.rf.gd/gamoge.pdfIn PDF document text
    • http://wekidezeze.epizy.com/sparkle_background_images_free.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_4f6f5cba56144527b02087e779186808.pdf?index=trueIn PDF document text
    • http://govuwetubor.epizy.com/69125151599.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_e6d9d55de30a4195bd7e7b84d2de7f5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2898847f-0046-461c-b020-0c9a232967d1/hp_probook_6560b_laptop_reviews.pdfIn PDF document text
    • http://voputujewijozej.rf.gd/6863260852.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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5012 bytes
SHA-256: 690bb56e606c5789e20f8c2dc52ef958cdb8e04ab76858819b85aa33891ebb61
font_01_sfnt_off000105be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BE 10836 bytes
SHA-256: bfcc715d0820f967b05132ec02a8b5d4bc479621e46b66ad15919f326fb92fe0

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