Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ede605469ab0b62…

MALICIOUS

PDF

72.5 KB Created: 2021-04-02 00:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2bcdb532e0e27264e73d2ae2da913e26 SHA-1: 78b26d2b4f6793ed3a7c16a27770a8290c54ae95 SHA-256: 7ede605469ab0b625ac2bae651ef5bcb78ddf17430535c6dfd82720c60a0f7a3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable or suspicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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=can+you+trade+options+on+webull+paper+trading PDF link annotation
    • http://leftoutclub.com/80451304352caru1.pdfIn PDF document text
    • http://getarileduvuda.22web.org/just_mercy_bryan_stevenson.pdfIn PDF document text
    • http://giftcard-sale.store/amos_and_andy_episode_guideuw8j3.pdfIn PDF document text
    • http://dashcamtopbest.com/how_do_i_go_about_becoming_a_foster_parenti25jz.pdfIn PDF document text
    • http://furniture21.online/57003824959095ix.pdfIn PDF document text
    • http://3bureaureport.info/borderlands_2_skill_points_guidesins5.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/30085438648.pdfIn PDF document text
    • http://casbah2point0.com/45966543284qyy54.pdfIn PDF document text
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/lajotokuni-lawusa.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/daluzuxodew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dumupa/telecharger_cambly_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784d01ab-46df-4d91-9d5e-fbf3d51c4304/womizolavarixazofisukotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863fcd8a-fcda-4ffa-b965-107559b7cbd1/acts_of_paul_and_thecla_catholic.pdfIn PDF document text
    • http://gifasovu.epizy.com/comparative_advantage_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/the_picatrix_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/where_to_stay_in_maui_for_road_to_hana.pdfIn PDF document text
    • http://zerojalosa.rf.gd/jacques_mathematics_for_economics_and_business_8th_edition.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_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 5364 bytes
SHA-256: 8f8b315c04b89adb960819dfcd9580edfda266858a2ac458e780f756e7e453e1
font_01_sfnt_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 10588 bytes
SHA-256: 25aea3c8ecdaec79be0133a71ebf315a04d2395ec0a2487f1705bdd0900afd18

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