Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf48f04fb48f725a…

MALICIOUS

PDF

81.1 KB Created: 2021-04-09 16:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dfdbbbd4244bb7f740f2aa389cc3e05a SHA-1: a91872e249a7a5bb12b40872984bd91c3474ac97 SHA-256: bf48f04fb48f725a0442c2dcf00890fb55ecbcf8bdc5fd06b4d3f377b7cde38a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=what+did+the+innkeeper+tell+mary+and+joseph+at+the+end PDF link annotation
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/sisegedeso.pdfIn PDF document text
    • http://online-bestshop.xyz/principles_of_geotechnical_engineering_solution_manual_7th_editiony48px.pdfIn PDF document text
    • https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/d3b1337335df.pdfIn PDF document text
    • http://topdouche.xyz/swann_dvr8-4575_manual_downloadph9ab.pdfIn PDF document text
    • https://nililuwuta.weebly.com/uploads/1/3/0/7/130775375/65f47189c6fd7.pdfIn PDF document text
    • http://magnetfix.store/braun_thermoscan_ear_thermometer_replacement_covers466x3.pdfIn PDF document text
    • http://meetsalle.xyz/12769798719umnx4.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/lWhhbFl/drop_smash_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxofepure/KqhdMji/66945002510.pdfIn PDF document text
    • https://zuwasaroniw.weebly.com/uploads/1/3/1/3/131380739/likejupojabomet.pdfIn PDF document text
    • https://midubumiw.weebly.com/uploads/1/3/5/9/135989619/debogukekijawo.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/Ujahgjf/8012288454.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/0Zzpib3/91272835751.pdfIn PDF document text
    • https://fivixevovisobav.weebly.com/uploads/1/3/1/3/131380347/2202786.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/seek_ye_first_sheet_music_freeo2ty7.pdfIn PDF document text
    • http://shoop-ff.ru/income_tax_act_1961_amended_upto_datey6jk6.pdfIn PDF document text
    • https://zuwisikap.weebly.com/uploads/1/3/4/4/134441997/juzamuzupesez.pdfIn PDF document text
    • http://trycabinets.xyz/65190168250z69y0.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/00105532-b06d-4108-960e-2a8fd759591e/bubev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666462b3-24b4-4517-a7e8-77f0763b4b60/73818862034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b0fe17-55a6-4760-bbeb-ad71ec443686/zibuludogun.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_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 5452 bytes
SHA-256: 31ee9990d8c9f96ea8e0e876bcf0811b8fd3dfc5b66329e073a893bf77fcb36d
font_01_sfnt_off0001131d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131D 10472 bytes
SHA-256: 2fad6fdc963349b92d245052fd524109ab5ae21427bbbc784c38286fc9595125

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