Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7b1c2c9a36ffec…

MALICIOUS

PDF

78.7 KB Created: 2021-06-01 17:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3c19f67125b6525013c2f2805c47ead6 SHA-1: 8e7cb48e743b872747256c31ff4ca63cbd96fa84 SHA-256: 0f7b1c2c9a36ffec7cbac5aa0a5253ae7ef49ef7fbae7f35a5d859eb2ab6a387
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded URLs and the document's structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ketchas.ru/pbw?utm_term=why+is+my+subs+not+working PDF link annotation
    • https://sipopupomiva.weebly.com/uploads/1/3/4/3/134307082/wupesogudej-posidivo-bitudadusoj-datan.pdfIn PDF document text
    • https://lusezatakobav.weebly.com/uploads/1/3/4/3/134352635/79bea362127.pdfIn PDF document text
    • https://vegiranelikir.weebly.com/uploads/1/3/4/3/134399044/tirige-welogozovenep-davobajob.pdfIn PDF document text
    • https://rigozogukex.weebly.com/uploads/1/3/3/9/133986215/5a90a.pdfIn PDF document text
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/fotusegozafarozuri.pdfIn PDF document text
    • https://munojafejim.weebly.com/uploads/1/3/0/8/130874523/tosuvofapu_bewepape_waruvetaxu_firudolore.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/3760575.pdfIn PDF document text
    • https://bimonodinedijov.weebly.com/uploads/1/3/4/6/134697137/popuxulopu.pdfIn PDF document text
    • https://pobubejafak.weebly.com/uploads/1/3/5/3/135314602/fopolador_musezitala_tubebufusawu_ruxupuz.pdfIn PDF document text
    • https://wilepera.weebly.com/uploads/1/3/0/7/130740018/xiwobegezoz_jodasametazuv_fapizuga_babiruve.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/puboxipababeni_sanivarejefepo.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/4bf56e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406223/normal_6005a2b9602e1.pdfIn PDF document text
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/48839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5ffb4cd536225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5ff1116c928a8.pdfIn PDF document text
    • https://vidufatow.weebly.com/uploads/1/3/1/4/131438098/wazobuvav.pdfIn PDF document text
    • https://givadebar.weebly.com/uploads/1/3/1/4/131437750/wemeretuj-midefasamin-nevumo-gigis.pdfIn PDF document text
    • https://ranekiwoj.weebly.com/uploads/1/3/0/8/130814960/vulejokagekoniv.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/dd920b53-4115-4ef5-af2c-161c3f69c817/rode_videomic_go_iphone_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5741fb68-29a8-48c0-b6e4-ed7cae2893f9/what_is_the_message_of_the_story_the_monkeys_paw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5017e81-e8ab-45c0-8e19-2ad2043b4d22/tewaveviwisuvul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5547fe0-33ce-4283-8bf9-75bef26a23e3/nirilovanogeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f533c07f-930d-4083-a57e-bf189e7062ee/dunife.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_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 5268 bytes
SHA-256: 6673c5cb1444eb6b1ff879701cd1acfcfa546c3a2936a94505b5d1fe5e83ca46
font_01_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 10644 bytes
SHA-256: d394e372602daaf166e37c466edda6dc1ffb4054ce33c178dbc08532ef3ea07d