Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e5381466773aaf…

MALICIOUS

PDF

85.3 KB Created: 2021-05-26 05:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 247fdf9ac574cc9d58c02d5528c4e8d9 SHA-1: e2ce70be0f2464a2b9d5e52ac72c594c989d1b3b SHA-256: e5e5381466773aaf5006cec8de179838027c79049b148c3e758ad4b80fecd543
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating a link farm designed to attract traffic through SEO manipulation. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score strongly suggest malicious intent. The embedded URLs, such as 'https://jumiwimov.ru/strik?utm_term=oxford+dictionary+english+to+hindi+pdf+free+download', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=oxford+dictionary+english+to+hindi+pdf+free+download PDF link annotation
    • https://wuwebiwurumebil.weebly.com/uploads/1/3/1/1/131164488/godirironizojug-lutiderulerated-webafuboz-bogarowab.pdfIn PDF document text
    • https://namutaborizelo.weebly.com/uploads/1/3/4/7/134766338/limoworivavetutuwux.pdfIn PDF document text
    • https://dagonaluwekala.weebly.com/uploads/1/3/4/6/134614864/kinake-dixofef.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/gunipijegera_xijikesekilazem_jujobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496204/normal_600a6663be329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd63b1406d79.pdfIn PDF document text
    • https://fatisejodape.weebly.com/uploads/1/3/4/3/134320205/a53806c1.pdfIn PDF document text
    • https://kuvixutag.weebly.com/uploads/1/3/4/3/134347355/foduba.pdfIn PDF document text
    • https://viramerobudob.weebly.com/uploads/1/3/1/4/131483281/posapifaburupu.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/9964016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/62063607571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f91df98-ff34-408c-98b9-cefedfbaa922/wafavovebipakopenisona.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/daily_telegraph_travel_guides_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d184a24-28ae-4f9f-ac2b-edf71e88a337/what_is_influencing_without_authority.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/90094467064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbaa605-636d-4b85-bbeb-498e08113f5d/zuleximoxoxotufapufis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3607bcd-5388-46bb-9e07-96a662b34062/batufogojuxomodevuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c7a096-935d-4512-a1ff-2dbaf44fa931/are_hyundai_genesis_expensive_to_maintain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7ec4ea-f984-4172-9956-356bef43d40b/house_music_90s_dance_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/thinkpad_t510_battery_9_cell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2603f83d-4b22-434e-aaaa-711b21d5203f/95206610583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fce014-694e-4ed2-b3bb-3ec2f51e69fc/optimate_4_dual_can_bus_bedienungsanleitung.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 5704 bytes
SHA-256: 813f9d467066437257650e1015028998d8a7aa9db22c47876b43d18bb49cd9ee
font_01_sfnt_off00010d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 10636 bytes
SHA-256: a33f3e492312465662f2eae420a25043413c00088202600ff461692ad8c6907a
font_02_sfnt_off0001322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322A 5788 bytes
SHA-256: 6c5e81104fd956c5f0744348d03d86beca9dd8703cfa499f846fdb2b941a5e3b