Malicious PDF — malware analysis report

Static analysis result for SHA-256 517c78a5603fdbdd…

MALICIOUS

PDF

103.2 KB Created: 2021-03-07 22:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58c6fae8e3eae33a420339a8d6546251 SHA-1: 254581660ced6e54c564db243f117cef181b345e SHA-256: 517c78a5603fdbddf7aaac1ba9b53b4ab2a13b47d642e8ae5c0d5ec151e247f2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is 'https://jottigo.ru/strik?utm_term=bible+commentaries+list'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=bible+commentaries+list PDF link annotation
    • http://taxevidel.medianewsonline.com/ridip.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/6344740057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tutasujal/how_do_you_write_a_good_career_development_plan_for_yourself.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_e7209dd9434549e7ba3e3270ad78f273.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_af8b945b0c5244888f68d80e04e05d24.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_c0a5f806e71c467a9b8ba0604695139a.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_e1efb75b21594aceb1729347b4dfc011.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cd874a-01da-47ee-b24f-a56ca97319d9/14031508817.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/75758818889.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/30425440232.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_ab9d4a2f6ce94359af0377188fc892b9.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_03e5340e9c214e83978d5cba5d1164e2.pdf?index=trueIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_9ee12e9eac0f463b8809c56a0e63814c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2c3154-1ab0-4a2f-b219-8fdfb259af02/lopi_1250_wood_stove_specs.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_32205ab134d74002906fd1b9ad90e17c.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_d16f1ee0f5064b379f9ec2398522010f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/haier_portable_air_conditioner_10000_btu.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/ivoclar_shade_guide_chromascop.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_dd914358366c4e56842958e0f6f76f0e.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_dac4364fc7df4ad99bfd20eaa341a025.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15119 5132 bytes
SHA-256: d2c1392c30caf02cb92f03e3ece054f4c481a7fcb3878d9719f554d96cc3f8c1
font_01_sfnt_off00016274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16274 14356 bytes
SHA-256: 229aca831380a8c47c0e42d4d2adf06b560087b239b5db3f1407adc1e2faa185

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