Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48db9d4049302e9…

MALICIOUS

PDF

79.0 KB Created: 2021-03-11 11:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f040dc4d7fdaf165c97ef5fef5f4bd9b SHA-1: c53d6e2b651f55ef54730eab484d86b75350a162 SHA-256: e48db9d4049302e9c511f88c277875a7ae24dcf2569f26885be7f862db6a12c7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The primary URL, https://xezojetit.ru/strik?utm_term=is+freya+odin%2527s+wife, is likely part of this distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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/strik?utm_term=is+freya+odin%2527s+wife PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4530910/normal_6000873684d82.pdfIn PDF document text
    • https://ropejanetim.weebly.com/uploads/1/3/4/6/134600341/pibada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5feef8d4396cf.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/26b5b66bea06.pdfIn PDF document text
    • https://befomunuduti.weebly.com/uploads/1/3/1/1/131164266/5162964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5fce8136c0618.pdfIn PDF document text
    • https://wokuzavewa.weebly.com/uploads/1/3/5/3/135339714/gurovinun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_602e43c0e17e5.pdfIn PDF document text
    • https://bodokevusigow.weebly.com/uploads/1/3/2/7/132740435/6461890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_600f596ead7e1.pdfIn PDF document text
    • https://vazanekufom.weebly.com/uploads/1/3/5/3/135322674/8f40a0bdd0dc0.pdfIn PDF document text
    • https://ginijamuda.weebly.com/uploads/1/3/1/4/131409148/kepinoxuniduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_60491640226eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_6038949e46704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472494/normal_603453f325e38.pdfIn PDF document text
    • https://riguzegadediva.weebly.com/uploads/1/3/5/3/135314075/4641517.pdfIn PDF document text
    • https://didunomupipopad.weebly.com/uploads/1/3/1/4/131438203/gilejivepijatog-logebaf-vuvalafadurudij-fukizodibowud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_602743e041c33.pdfIn PDF document text
    • https://fumozowafujazuv.weebly.com/uploads/1/3/5/3/135331302/silakufewit_jezugegisewig_laxejo_doniwitabo.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/9895ea68-3b57-42b9-a69b-34cec903adbf/64980223764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7351bae6-de4b-4e22-b3fc-6ea5968cbee5/liwataweguratesutanep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64db56e-c8b8-40e7-86eb-f50d6335e4e7/mezoludomorolepotu.pdfIn PDF document text
    • http://suxanovovogemi.rf.gd/54870752946.pdfIn PDF document text
    • http://detosiko.rf.gd/80090803762.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/how_to_reset_my_sony_nsz-gt1.pdfIn PDF document text
    • http://jujonejetas.epizy.com/24158921399.pdfIn PDF document text
    • http://zusewijoje.epizy.com/1_to_10000_spelling_chart.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_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 5036 bytes
SHA-256: 5a1917d6b2605ae2795e03b04df0ef0d1eb52f22efcef532ffd360f07fa6b2cb
font_01_sfnt_off000107ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 11140 bytes
SHA-256: e1a94f428e8aab0d8d44ad69cd4619cba8aa61eb5001d3c3858b8a9685b4bfdf

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