Malicious PDF — malware analysis report

Static analysis result for SHA-256 939a1609033f74bf…

MALICIOUS

PDF

78.0 KB Created: 2021-03-20 09:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8eb33d2ed19dfc1701ca0f6ffd3630fc SHA-1: 303e1851adda3624cd52f86b9ee0dc4b18e85929 SHA-256: 939a1609033f74bf4aa3827e17e19aca356f3e6d488149f0bfd519187d3e40f4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9991

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://xezojetit.ru/strik?utm_term=john+deere+2653b+mower+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456985/normal_603258213db96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_60378e0c66380.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/a845533.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465400/normal_60065a878ad56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473622/normal_5ffbc1d82bdcf.pdfIn PDF document text
    • https://fusonunobowur.weebly.com/uploads/1/3/0/8/130813531/f387b2bfd9d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_6054e337cb195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_600f2cb415351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_60120a370b21f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490950/normal_603290a4e7208.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483842/normal_5fffa1a311644.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/9953973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_6024872c7fce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_6002a23ce11a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_5fdba233ccf44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fd0893f3817f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_6038575019fd3.pdfIn PDF document text
    • https://nowabarabowuxo.weebly.com/uploads/1/3/4/3/134319250/2905006.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://uploads.strikinglycdn.com/files/7ef76986-f4c3-41d6-ae99-756877c69aa5/knight_of_the_seven_kingdoms_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd075a40-da01-4946-a4f5-618d762d3c4f/74119392010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76b2b3b-fec4-4e20-b3aa-31fc422d1c69/how_to_get_mp3_on_iphone_11_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fdfa96-476e-4147-b0bc-e511a3be8690/how_to_find_percentile_using_z_score_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29045723-d28b-48b1-a9ce-ca3ec18e92b5/75615338216.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_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 5604 bytes
SHA-256: 2909867b6e57a7f34143f4f700deff5b31c5af103481a319c8ddd7e860f5e40c
font_01_sfnt_off0000f79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79E 10772 bytes
SHA-256: 9413b0ab4752df4523a1cf70ebfe64959a91ad44380c81aef358b4dd2ef53020
font_02_sfnt_off00011c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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