Malicious PDF — malware analysis report

Static analysis result for SHA-256 0568b750f04c8aee…

MALICIOUS

PDF

76.0 KB Created: 2021-03-05 04:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5fc6f2fb1e3813d4d24b9211a733dec2 SHA-1: 938f9c8597113e30e1e00c49e3f274abc84d423a SHA-256: 0568b750f04c8aeeaff4be1eb675f12ae814c5e3add8206407eea294b2f718f1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://baarspo.ru/strik?utm_term=caltrans+bridge+design+details+manual', is particularly suspicious and likely leads to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://baarspo.ru/strik?utm_term=caltrans+bridge+design+details+manual PDF link annotation
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/vabipimumupi-kodarowevebenup-mubomuguvapo-nawunudewoxo.pdfIn PDF document text
    • https://zilonuxe.weebly.com/uploads/1/3/1/6/131637529/birugetepovaba-mixis.pdfIn PDF document text
    • https://cdn.sqhk.co/refimadaraze/0pMGKOn/vusisalobisaxum.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/gideguwisi.pdfIn PDF document text
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/zuketevefonadoneveja.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/OyhjqYR/nodavabikakub.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/567fa8b9c177.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/fMijhgj/rock_climbing_anime_mal.pdfIn PDF document text
    • https://kavasudominid.weebly.com/uploads/1/3/0/8/130813783/fikupig.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/hcIhhgc/unfollowers_and_ghost_followers_apk_mod.pdfIn PDF document text
    • https://mogalarozo.weebly.com/uploads/1/3/5/9/135968713/2e7362237131.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/tutobidatupeki_sawupamif.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/lozilowugez_fojoxag_baxenox_gusas.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/89d635b0c.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/mabigituwedu-lefalo-mulizun.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/vepura_kojuli.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/wKieid4/53051467804.pdfIn PDF document text
    • https://zigudawaza.weebly.com/uploads/1/3/6/0/136035030/7db6394d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_e8c1445adb274316acda67fe621d3a03.pdf?index=trueIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_b0950bffa19645e1bd1fb922cf80fe05.pdf?index=trueIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_48682bc134c34481831704cce7212ef2.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_3217610b30bf4d199a42a5a0c3dceacd.pdf?index=trueIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_33912724c4b045cb88ef18873f0173b7.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_d07bf6e598164918946798c9806e9caa.pdf?index=trueIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_d271ef4a363c467d82858d2cb4f8d683.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_04da8dee99a5438f9890bc5b1fb32b8a.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_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 5188 bytes
SHA-256: c96e5324cde5e0799889e2f1244c8d9fe34d50c088da1bc892ae8da51cd0350c
font_01_sfnt_off0000fd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD80 10828 bytes
SHA-256: 9a13b9af7a573c05de79aaf487e65a15bb3c8c7b8c8917d533302230b8d71e8e

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