Malicious PDF — malware analysis report

Static analysis result for SHA-256 430accbabfdeeca1…

MALICIOUS

PDF

80.6 KB Created: 2021-06-03 05:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4b823f4357b729fbd3748e4df36e107e SHA-1: 2daef9a4bc3022d0c09ce3731beb24d544cbbae6 SHA-256: 430accbabfdeeca1ce555a6914a4647cfa301af9b10145fa1b2cc1613c759cd8
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, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. One such link points to 'smidgel.ru', which is likely part of a phishing or SEO manipulation scheme. No scripts were extracted, but the presence of numerous external links points towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/pbw?utm_term=fisher+%2526+paykel+counter-depth+refrigerator+rf201acusx1 PDF link annotation
    • https://zapirawega.weebly.com/uploads/1/3/0/9/130969804/xatus-bijerakizuxijiw.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/8bb099805.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/wijuwo-misazedurufovun-rosapojiveg-fakijezipetu.pdfIn PDF document text
    • https://lumejukotexute.weebly.com/uploads/1/3/1/1/131163930/loxowi.pdfIn PDF document text
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/2406988.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/nutafejosanunabip.pdfIn PDF document text
    • https://zagibekopawof.weebly.com/uploads/1/3/1/4/131453283/tujaxapudaruv.pdfIn PDF document text
    • https://dilaxala.weebly.com/uploads/1/3/4/8/134865885/zixijutevivapata.pdfIn PDF document text
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/83fafc8a09b.pdfIn PDF document text
    • https://batujesidow.weebly.com/uploads/1/3/4/6/134666028/32996.pdfIn PDF document text
    • https://sipopomek.weebly.com/uploads/1/3/4/6/134632846/6723314.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/5863832.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/552554.pdfIn PDF document text
    • https://filuramaz.weebly.com/uploads/1/3/4/3/134314207/2063607.pdfIn PDF document text
    • https://delosixopefo.weebly.com/uploads/1/3/4/3/134344482/3941127.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/7458378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funinupun.pbworks.com/f/does_jbl_own_harman_kardon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e782f3-6600-4a0e-9c73-b0cb20d89d3d/how_to_show_house_rent_allowance_in_itr_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4995975f-e0b9-49f1-9746-cdb5709fa1bc/yaesu_g-450a_schematic.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/crazy_alien_full_movie_download_in_hindi_480p.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 4480 bytes
SHA-256: fdd65a1b7cb00809ed661061305c0cd7eaf66c9ac7ea8a67452f74b819ff3f13
font_01_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 1796 bytes
SHA-256: f2fd644e4456c386070f09a2777277c31662a4a00a06e6a83a863dc8a0122cd5
font_02_sfnt_off0000eced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 15892 bytes
SHA-256: f5d3387e68e7eb4895230f0df80e483b4dfb1685f67a8ef2cb9bc705cd502453
font_03_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 16080 bytes
SHA-256: c2948f170a647ced29a409dd5056167f0f2f746fdb9b989302c08c832dd6fac4

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