Malicious PDF — malware analysis report

Static analysis result for SHA-256 0304150c651d9b21…

MALICIOUS

PDF

89.4 KB Created: 2021-03-25 12:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7a9d3082ccc9dee05063636a63568c87 SHA-1: 513548252bbed6f66c9b5a988fb97decc838d5cf SHA-256: 0304150c651d9b21fcb3fb3d63bc37e6afe497dfdd17574b3b3eca10b4ece781
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=how+much+does+being+a+foster+parent+pay+in+texas PDF link annotation
    • https://cdn.sqhk.co/jaxugaveg/jKgijd7/rise_up_coffee_roasters_near_me.pdfIn PDF document text
    • https://damatabawapu.weebly.com/uploads/1/3/1/3/131379320/lavejube-nidawubosisime-nijasi-mawojorata.pdfIn PDF document text
    • https://dojunulopifo.weebly.com/uploads/1/3/4/4/134445836/fawelaravotinu.pdfIn PDF document text
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/5845984d.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/mogog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_605417b4e81b4.pdfIn PDF document text
    • https://ziwagugo.weebly.com/uploads/1/3/4/1/134131511/5984444.pdfIn PDF document text
    • https://samoderusewon.weebly.com/uploads/1/3/1/3/131383586/5e8c60e5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471240/normal_5fde23e3c2fd8.pdfIn PDF document text
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/f2b0f.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/jfyYgh2/fafifulagar.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/1852321.pdfIn PDF document text
    • https://cdn.sqhk.co/noxawuge/bFidjdw/88671882022.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/gcmJhdp/64511389116.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/9jgrSiM/dawn_of_civilization_an_educational_game_app_download.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/dimoduwivapaxif.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/5022579.pdfIn PDF document text
    • https://dakubotamijez.weebly.com/uploads/1/3/2/7/132712147/6190198.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/38acdb9ce67.pdfIn PDF document text
    • https://tapugagujug.weebly.com/uploads/1/3/0/8/130813715/6027514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_6051e0d47e919.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_c67864a669604560b378b773199159fc.pdf?index=trueIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_8b12290fc6b94e67a358f34134f76584.pdf?index=trueIn PDF document text
    • https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_e7b91be4a2e2460f9525be2c6f54ef60.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_off0001108e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 5780 bytes
SHA-256: 576606563897f45a93cf5df8805f478371897aecc6124d43aa178577426793f5
font_01_sfnt_off00012428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12428 10952 bytes
SHA-256: 334434f8eedb0465ab98d93f9a7a92b378746985af6f0987c79a5ecac98f2672
font_02_sfnt_off0001498c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34