Malicious PDF — malware analysis report

Static analysis result for SHA-256 346ee5d7832a8bbe…

MALICIOUS

PDF

71.2 KB Created: 2021-03-26 09:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5d9f1fc0f6afca8de676e8324590ef02 SHA-1: 51cbd7a361726c3403d3520d55f40fba7be7c614 SHA-256: 346ee5d7832a8bbe8682db1f5bc91f5685f927c998deb8e15e17494f1687439f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

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://bologen.ru/wix?keyword=cold+stone+creamery+business+for+sale PDF link annotation
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/tagebapozuxilu-jegiridudo-jilajisemel.pdfIn PDF document text
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/timijazazejeve_fojetuzivos_daniwodija.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/xowivamuxijazor.pdfIn PDF document text
    • https://tizezesi.weebly.com/uploads/1/3/4/0/134041120/1057583.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/bawagitevuxij-bosulumexori.pdfIn PDF document text
    • https://vowijavig.weebly.com/uploads/1/3/4/3/134319359/pakowozoteveroluju.pdfIn PDF document text
    • https://zutumageru.weebly.com/uploads/1/3/0/7/130739253/tirefuzosetepumiduk.pdfIn PDF document text
    • https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/vizaja-golezovosiki-muduvaluzig-gezezema.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_5430d01fef434bfa961234e80b004806.pdf?index=trueIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_811d2bf425c9412b82756805c771d930.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_22225894f8934113a20100e3750170f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9ea674-2b13-4b8a-ae36-59b6f7c04044/why_is_my_panasonic_ac_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b6d109-b564-4950-bb86-7c6b8208d547/69159486703.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_bf43ddd9d85b4c4b825e50e1c1fdff7d.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_e8508c15cc4348bcb1fd3af0f5da6903.pdf?index=trueIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_5413348d1767476caf5a365d47daf1a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b1c127-7fe6-485f-939c-ab8a1fb7d68a/how_to_tell_how_old_my_water_heater_is.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_9eff4e60f3bf4f8482440d174edf358d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d89d0e-d09b-4204-8a48-1e91b986d6bb/how_to_draw_anime_step_by_step_easy.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_7dafcef9e4f44c3bbce80933dc424d95.pdf?index=trueIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_819507aecf81476db1087d975684bbed.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_199dc0cc55b448f68ec8d8500766cb1f.pdf?index=trueIn 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_off0000d53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53A 5312 bytes
SHA-256: ee56e6dda4b61895d73145442fe59218fc7530f747426c6d8a52c385cf5ec818
font_01_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 11152 bytes
SHA-256: b3863ca14f19542f83f0d63f2888ced6453b8f22a364a797b023d74c84e5e061

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