Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd86f071218b3b4…

MALICIOUS

PDF

79.8 KB Created: 2021-03-06 16:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2c29b4d7f602ac6ab95c7eff25a9ca2f SHA-1: 95ee12d03c549817967d2ead5cecb0a7fa5e6a14 SHA-256: acd86f071218b3b4e331bd1aa5c49c029b3209b37a692b5527c1545e47baba10
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical PDF link farm detection and a high-confidence ML classifier. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One prominent URL is https://xezojetit.ru/award?keyword=what+is+a+remote+collar+for+dogs, which is likely part of the lure. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=what+is+a+remote+collar+for+dogs PDF link annotation
    • https://mozejoli.weebly.com/uploads/1/3/4/8/134864480/5952065.pdfIn PDF document text
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/pivunonefafeno.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/ielts_writing_task_2_sample_band_9_answers.pdfIn PDF document text
    • http://mujusudi.iblogger.org/honeywell_rpls730b1000_u_7-day_manual.pdfIn PDF document text
    • https://pawizujepus.weebly.com/uploads/1/3/1/6/131637171/xejovaz.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/nopizikit-kuzova-xosadanifo-puxatezuxu.pdfIn PDF document text
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/e05983.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/xaxobigaz-mepileg-gebepavasazug.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/how_to_setup_d-link_dir-615.pdfIn PDF document text
    • https://kowexemi.weebly.com/uploads/1/3/1/8/131872048/2062130.pdfIn PDF document text
    • https://lokizidaputanex.weebly.com/uploads/1/3/2/6/132680869/zorobozol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketufazez.rf.gd/zaviluvawujajubepowififeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af594d45-e5bb-4798-b591-3d69ce8bfd46/temagikobuxekes.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_234e88a608e24cefbb3b38c948f71b6c.pdf?index=trueIn PDF document text
    • http://ritanuwo.epizy.com/rixinikumuv.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/takelodidobogeje.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_67c7489614704b9f9ac8ba4869e128dc.pdf?index=trueIn PDF document text
    • http://bisiziwaros.epizy.com/63631213528.pdfIn PDF document text
    • http://xikusaduxofi.atwebpages.com/how_to_get_rid_of_old_acne_blemishes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8615d9-1d67-4d13-9964-1a54c11e9e10/67447251161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e81105-9bd7-4bd7-8885-498ecbdc2d86/adobe_acrobat_xi_pro_serial_number_reddit.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/vefaju.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_ce2e700c01a64596a47126e7c683502f.pdf?index=trueIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_cd819ea3329740aca543b7721c91ef02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b05ca2-25ab-4bf4-ac94-bfd15fc9e0be/is_powerline_internet_good.pdfIn PDF document text
    • http://vasugam.rf.gd/11566910689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b6123e-73c7-40a3-9750-f9f2634874c6/delonghi_pinguino_portable_air_conditioner_-_13000_btu_review.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_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 5448 bytes
SHA-256: 63f8ac3e40d1bd1ff05ee73f78f8828f923afdf9575f45fa0f5df0d0cfe0c2d9
font_01_sfnt_off000108d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D9 11932 bytes
SHA-256: 9b00906c666c9f4f0f76810c211389a817af7d4aa35d56ed3aba42947bf0d771

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