Malicious PDF — malware analysis report

Static analysis result for SHA-256 da74dbb93a557baa…

MALICIOUS

PDF

81.1 KB Created: 2021-03-22 07:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d0808a6ed34facbce5433ccc1b539f0b SHA-1: 576baddb45497074f53580d0005ab2f76affafb7 SHA-256: da74dbb93a557baa9d021b86eb7e0725472a6f48dd36ab84f6e03b3a44ed5af7
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/strik?utm_term=excel+vba+find+last+row+with+text PDF link annotation
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/senevokozo.pdfIn PDF document text
    • https://mijagipiked.weebly.com/uploads/1/3/4/5/134524971/boxadatonusapa.pdfIn PDF document text
    • https://musaseruvadix.weebly.com/uploads/1/3/4/5/134581888/demototuwepir-zebuboxamumotu-falokinerapuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_60542f4ef0520.pdfIn PDF document text
    • https://fozapiko.weebly.com/uploads/1/3/0/9/130968993/numubeloxamevol_rofozeduwure.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/el_capacitor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423452/normal_5fff95b82f7d1.pdfIn PDF document text
    • https://kumuxulunewun.weebly.com/uploads/1/3/0/7/130775174/lukakuwemazufedipezu.pdfIn PDF document text
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/robagizes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_604a811459ed2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_5fe404777a893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_604c9dbd0cdc5.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/musemoritetuno-naboki-nivobadubix.pdfIn PDF document text
    • https://jovavogi.weebly.com/uploads/1/3/4/5/134597399/996f540.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefabe/kane_chronicles_movie_anubis.pdfIn PDF document text
    • http://wepunulirepobi.myartsonline.com/cedaw_optional_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/60172578700.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_097b45ea8f14472b8a4ed941b82efb54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/turip/cdr_reader_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/how_to_calculate_ww_freestyle_points_in_a_recipe.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_09e026b651844f7b8d0f0f7f4beb91bf.pdf?index=trueIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_17a9576aefb7492bb915df7c835f50ef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 5428 bytes
SHA-256: c8f11797afe608a9bf7c5baa1de9201c7656a204222913c09f6083fd791ceac6
font_01_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E98 11196 bytes
SHA-256: 0d82bd208150ed5dca2cdce2b144fbcb0d4874f254c206dcea79bc15cae2bcc7