Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb79ee8fc0cd6f2…

MALICIOUS

PDF

78.3 KB Created: 2021-03-03 08:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b0685c06d0978be03e1da8c35d8c8f75 SHA-1: 6e4a8a530e3d55bce210fc95290e5ceb3a084ae9 SHA-256: ddb79ee8fc0cd6f214a3fdba315fc63c286b61989ba67b5601fe43008b538058
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various PDF documents. One of the primary links, 'https://dugedepap.ru/strik?utm_term=volvo+penta+sx-m+repair+manual', suggests a lure related to repair manuals, likely to deceive users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=volvo+penta+sx-m+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369935/normal_6035b1923bacc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454965/normal_5fd3145cf1b0f.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/9dqlcn2/21279297833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_603066407f24a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_6005b4c96ec14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5ff764db2a35c.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/hdedghV/angie_s_list_duluth_mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_602bf5c275c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_6013f5f762949.pdfIn PDF document text
    • https://cdn.sqhk.co/zojisixu/SzJHlNf/dessert_recipes_easy_chocolate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500199/normal_6028a984a09ba.pdfIn PDF document text
    • https://butavuzi.weebly.com/uploads/1/3/2/6/132682386/8239905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_602b6368c4fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458824/normal_5fe2ec56c2b10.pdfIn PDF document text
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/2363983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_601b3e8fd8c06.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/Djj5Oii/luvonalazeveg.pdfIn PDF document text
    • https://gepogujewo.weebly.com/uploads/1/3/1/3/131382217/pebanipijakin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_603184667d326.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://s3.amazonaws.com/zalomi/tolifasafabuzifax.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/alarm_clock_android_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/emotions_list_english_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/administrao_de_medicamentos_via_parenteral.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 4972 bytes
SHA-256: 23ac7fbac2deb1589aa0e6a344a6a3cf82084e61164aa8df1a15184c80739ea7
font_01_sfnt_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 11148 bytes
SHA-256: 6b9666048f73ba14b72070f2590bc4a24f2d6b7cf1d36d736492cb8ae85b75b6
font_02_sfnt_off00011db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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