Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03a89e825a721e0…

MALICIOUS

PDF

79.2 KB Created: 2021-05-24 15:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fecec295ad119aa26b032ed787579039 SHA-1: b4f5b38886903076be08b12ac47ed6fa6eec1274 SHA-256: b03a89e825a721e0b48c84777210139efe3188453aa2037e0b2410078fcc4083
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'garment steamer' and is likely a lure to direct users to malicious or spam content. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=how+to+use+garment+steamer PDF link annotation
    • https://gijojipile.weebly.com/uploads/1/3/1/3/131381352/7122442.pdfIn PDF document text
    • https://futisukafasuku.weebly.com/uploads/1/3/5/3/135345320/kojujaxaji_nipidu_leluw.pdfIn PDF document text
    • https://lilexoben.weebly.com/uploads/1/3/5/3/135331811/3762851.pdfIn PDF document text
    • https://famalekirujapa.weebly.com/uploads/1/3/1/4/131453917/ponaguxuvipinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500883/normal_606856151e683.pdfIn PDF document text
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/ae467.pdfIn PDF document text
    • https://xupovefodifej.weebly.com/uploads/1/3/6/0/136053951/sakumodud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fd76355194c0.pdfIn PDF document text
    • https://patajarixeli.weebly.com/uploads/1/3/1/0/131070073/rugakawo-talejari.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/600516.pdfIn PDF document text
    • https://lotekine.weebly.com/uploads/1/3/1/3/131381428/e16de9b906106.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/xijuwutimuno-gugakadejizoref-sotimoxukogu.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/a7bbdeac21fba6.pdfIn PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/8798563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_6037fac92c4bf.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/512692b9.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/d3fbcf71-c651-4698-aa71-ab806f2d07b9/23654509746.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/personality_test_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/84706976877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d94682-b825-4084-a30a-d1b9dee50433/96772925878.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/never_be_the_smartest_person_in_the_room_quote.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/lettering_practice_sheet.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_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 5028 bytes
SHA-256: d3db7b894e03f767305772a1a19e3967b0af2d4a5c6359e6c93a49b6185c8085
font_01_sfnt_off00010a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 11020 bytes
SHA-256: de908d77a0a0d2bf3f32bf7afc20a2fff987c0411133cef3ec77f39bb72cbf1f