Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9adb111e0255d74…

MALICIOUS

PDF

72.2 KB Created: 2021-03-17 04:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d5ca8da177fff497849d22414d0090fd SHA-1: 39d5229d56152b296f8390aebb187d45e1775ea5 SHA-256: f9adb111e0255d743a541a52d6ded3326922e2e4c09abd424fbefd728196bdbf
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. Heuristics indicate a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The embedded URLs and the structure suggest an attempt to redirect users to malicious or deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=essentialsspawn+plugin+commands PDF link annotation
    • https://lofizalu.weebly.com/uploads/1/3/4/6/134601384/nibapu.pdfIn PDF document text
    • https://murasujudadalox.weebly.com/uploads/1/3/5/3/135338307/1724171.pdfIn PDF document text
    • http://alexsaf.ru/lekavojivinexadorudujsrpf7.pdfIn PDF document text
    • https://wumibopoz.weebly.com/uploads/1/3/4/5/134511789/6460220.pdfIn PDF document text
    • https://gujejedadun.weebly.com/uploads/1/3/1/3/131398181/dubizakuwagexut.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/d47c3.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/56697714961.pdfIn PDF document text
    • http://lnstagramcentre.net/63510517287w3crq.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/xiwinedabob.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/djbgm8E/aderant_expert_on_the_go_time.pdfIn PDF document text
    • http://onsideball.info/how_to_find_the_measure_of_interior_angles_in_a_polygonekan0.pdfIn PDF document text
    • https://sokimazivad.weebly.com/uploads/1/3/4/6/134620474/kekenokimun-zikabixu-vapoxefetisifij-pulaxezo.pdfIn PDF document text
    • https://katabeguravaka.weebly.com/uploads/1/3/1/4/131407194/kamusitotosemuz.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/yPgjghT/online_mazes_for_5_year_olds.pdfIn PDF document text
    • http://spacexfoundation.net/d-link_dir-825_ac1200_wifi_dual-band_gigabit_router2jey2.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/dX2hbwP/22877970917.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/pigulugagejog_wetud.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/international_bill_of_exchange_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/niggdia/infected_toe_cuticle_from_pedicure.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/accounting_for_decision_making.pdfIn PDF document text
    • http://getsalle.xyz/172550339085y4w1.pdfIn PDF document text
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/ginowusetura-fajoli-kefelebuzokuso-biginigakuda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_d7123b52b84d4fc380ad57c5b6fc8f5c.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_b0b8f7bc5a69491aa2baa279e46c34c0.pdf?index=trueIn PDF document text
    • https://6da1ed31-7a22-45b0-8bc5-463d376071ee.filesusr.com/ugd/29fbaf_7b07eb7ecabd455da95534b995a7b6a6.pdf?index=trueIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_b9b91ee5f87d405d815d8ad803f359f1.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_6efeb37ba5d74918881ae73e3a7cc541.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC99 5344 bytes
SHA-256: a4afa70e5515d2a8f211000dc8e64a933cf1e7faa1c4b404221d8c14b16fa3ee
font_01_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 10376 bytes
SHA-256: 179b90bb72461a33fc48b9d8f97b60fba1ef8dbab7619a3ef4bb9296e1aaa0a0