Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab75bfc0e418937…

MALICIOUS

PDF

90.3 KB Created: 2021-06-09 11:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 555f11c85fdf5491c186a3686daf6fbd SHA-1: 24b49e79f1af2a3f745cff978f87b112694880b5 SHA-256: cab75bfc0e41893701ed0a3a746d3aaa13ca50df0eddc8419bdc26c336540836
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to domains associated with SEO spam or phishing. The document body, though heavily obfuscated, suggests a lure related to 'capeweed control pdf'. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially malicious content.

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://golowaki.ru/123?utm_term=capeweed+control+pdf PDF link annotation
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/7568868.pdfIn PDF document text
    • https://masarifixi.weebly.com/uploads/1/3/4/4/134486171/velanogejejabo_veketalinivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_6012978ac5d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_606b7c017bde0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_6024159b4926b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453115/normal_6004443ab75cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_5fea42ee38c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_601e6217f28e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461481/normal_5fe16752346c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446287/normal_5ff0c4c1c21e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530036/normal_606cd271c97d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5ff6c5fa86ff7.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/79d1d3068e58af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_605c638ee2643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_602fdd53ea761.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/0d218d2b-ed18-40d6-8c4a-c8cf5f601df5/what_time_does_black_friday_at_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925a877c-5a61-4bf6-8449-47adac66e719/46862927524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173be8d5-68d1-45fc-876b-352663b4dbbb/51945587465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c5248f-7a51-4c03-85b9-fbd22b3d7c83/nkjv_bible_free_download_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a3f5a9-8a09-4a72-a431-1dbe7cb9eab1/norton_ghost_2003_bootable_cd_iso_download.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_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 4968 bytes
SHA-256: 268d8a17a81e41bbd3734685ead1ef4ecb0fafcbb4c68240a4e92ec3edc59c85
font_01_sfnt_off00013803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13803 10576 bytes
SHA-256: dcc844367270650382a840a714f70a29f0f8bcae7103719ad4e0a9a0fb27374e

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