Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d8e3edc99fdf0f…

MALICIOUS

PDF

100.9 KB Created: 2021-04-01 07:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 355459ac296c90d55674f6c61a6eacff SHA-1: 2242a118030986844ed5ddfcc2db4b0df7b983b5 SHA-256: d6d8e3edc99fdf0f86088dbbb788589251cc8e3b54ad3fe516fd404f717d3502
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. The primary URL, 'https://jumiwimov.ru/123?utm_term=tv+addiction+1+ielts+reading+answers', suggests a lure related to 'tv addiction' and IELTS, likely to direct users to malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=tv+addiction+1+ielts+reading+answers PDF link annotation
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/ziguvusexerozuje.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/mudufibivabajaz.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/gabixazurin.pdfIn PDF document text
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/mufofifegulexorozer.pdfIn PDF document text
    • https://robaralimojo.weebly.com/uploads/1/3/0/8/130814718/zosokeberi.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/meziz.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/kitujupadunimi.pdfIn PDF document text
    • https://temevukovekolax.weebly.com/uploads/1/3/4/6/134688950/6766058.pdfIn PDF document text
    • https://zemotererozo.weebly.com/uploads/1/3/0/7/130738962/1590416.pdfIn PDF document text
    • https://sejubapis.weebly.com/uploads/1/3/4/8/134887951/powugizozozij.pdfIn PDF document text
    • http://vinezusazal.iblogger.org/what_questions_to_expect_in_a_college_interview.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/e95a1f3a-2c60-4aae-bd9c-2810f8bb5c65/wolf_gourmet_countertop_oven_manual.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_c7bbe03a0b864e4f98ffa7fc221209de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9be66e-b132-4f32-bc06-4dde822b094e/hamilton_beach_steam_irons_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439e8108-6b70-4304-972a-bde11ba7538f/67860634833.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/insurance_europe_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5550e7e3-4ff1-444a-9a8b-9d61e7e89763/17805398834.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_2ca76b421df3424ea2dcb53563748c65.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_896dd7981647436f9fd3b1b7c20c311e.pdf?index=trueIn PDF document text
    • http://biwovake.rf.gd/word_families_kindergarten.pdfIn PDF document text
    • http://wixesikive.epizy.com/summer_infant_baby_monitor_not_connecting_to_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/how_difficult_is_the_inferno_osrs.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_off00014c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C0D 5260 bytes
SHA-256: 42dc106b751893d69fb16ba613ca36d66d2fac8bf7fd956f5ba790c64ce8f07c
font_01_sfnt_off00015e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E17 11340 bytes
SHA-256: aed40d9e4ddce222f79b7781d7e0e949891a53a9bae235cbfe78496ce4a2de1b