Malicious PDF — malware analysis report

Static analysis result for SHA-256 3395675db96e1dbb…

MALICIOUS

PDF

71.4 KB Created: 2021-03-15 09:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8c7a44a2d0313f0f16e6c7388c7ab4bb SHA-1: aa1ec2ccdf7f4b7eaea42b107ace17849d0618ad SHA-256: 3395675db96e1dbbfb50893d11b5a9415cea69e3aaa114cbf416c753aadb46c9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The embedded document body is heavily obfuscated and appears to be non-readable text, suggesting it is not intended for direct user interaction but rather to facilitate the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://botokaw.ru/strik?utm_term=is+polaroid+a+good+speaker+brand PDF link annotation
    • http://kugibut.22web.org/materi_pelajaran_akuntansi_dasar.pdfIn PDF document text
    • https://fatibetoliwan.weebly.com/uploads/1/3/4/7/134731660/2734476.pdfIn PDF document text
    • http://duxolaw.22web.org/2272786318.pdfIn PDF document text
    • https://xuvunigito.weebly.com/uploads/1/3/1/1/131164310/29bab6b559.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/2571bec.pdfIn PDF document text
    • https://tijagure.weebly.com/uploads/1/3/1/3/131398232/4017690.pdfIn PDF document text
    • https://nizodori.weebly.com/uploads/1/3/4/0/134000204/f5eab9d70138202.pdfIn PDF document text
    • https://nuxofenaf.weebly.com/uploads/1/3/5/3/135306259/4838812.pdfIn PDF document text
    • http://rafale.store/ambani_samuthiram_video_songsp1h0d.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/roziwalegonuv.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/begalegoniwobe-xolesix-zezivufusupoz.pdfIn PDF document text
    • http://virona.org/kamusilerolemajezew9s53e.pdfIn PDF document text
    • http://netlysy.online/composite_materials_wikipediah38mn.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/zaxevemixediwak.pdfIn PDF document text
    • http://menetufebev.22web.org/t_d_s_full_form.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/xoxasufikob.pdfIn PDF document text
    • http://carinsrates.com/paypal_payment_authorization_formx2wsa.pdfIn PDF document text
    • https://fotularujofo.weebly.com/uploads/1/3/0/7/130739653/703528.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/ff0f1fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_388aa6f12ddd4481ae67d131fc1d95a2.pdf?index=trueIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/sekepaxazopaso.pdfIn PDF document text
    • http://novosumagib.epizy.com/79740259829.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_4790b16d81a74d09bb77a1b27083eff4.pdf?index=trueIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_ae7cfadda83d4de2be307f95b3de60f4.pdf?index=trueIn PDF document text
    • http://wotidupodugi.myartsonline.com/how_to_find_the_age_of_a_whirlpool_water_heater.pdfIn PDF document text
    • http://zesufes.epizy.com/47039540755.pdfIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_b0549b67ae6e43009fc14be0afe8b581.pdf?index=trueIn PDF document text
    • http://weponigonimogo.myartsonline.com/84960598056.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_off0000d898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD898 5268 bytes
SHA-256: a295700eaaecb8aa01e4af45b7a1e916ff9d8fa190c8ff07afbedee66d5648c9
font_01_sfnt_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 10820 bytes
SHA-256: 70c00cef15d42c3ce7ff2109539ab063ae2fa0763eb690e4fcc664013f76c09f

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