Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30b61d5f74e213f…

MALICIOUS

PDF

73.2 KB Created: 2020-12-31 23:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 50b349332945f4a17357c5fa8d3bd6bf SHA-1: b7696437726af1947f03a1be10a1bf83b26b500a SHA-256: c30b61d5f74e213f5e839cdb9290932a31423f940c577bf0c9f962be239826ae
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to distribute PDF files. One prominent URL, 'https://trafftec.ru/strik?utm_term=dream+piano+mod+apk+unlimited+money+and+energy', suggests a lure related to obtaining modified software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/strik?utm_term=dream+piano+mod+apk+unlimited+money+and+energy PDF link annotation
    • https://midatapeb.weebly.com/uploads/1/3/1/0/131070166/lapokisokapa.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/9813129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5fc41d4c27853.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/1631e28e-2e86-4aab-880f-aed05cdcfb79/demugarujujugowebogaso.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/20539241823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfee099c-7624-4c25-a71a-24d623a521c3/36110395675.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/20045309084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f419d70-2cd4-4c36-af89-0f59c690df42/alone_marshmello_piano_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0101b532-b4f7-4e39-9e42-2c0008d20851/15043928174.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/78094013811.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/little_lamb_hot_pot_menu_buffalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f045d9f-7f54-4482-9ba7-9c348d52c2fe/66920416520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571fa7be-0ed1-4375-b287-8985bc487b52/bugiraxugupivajomedajata.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/68582103963.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB65 5148 bytes
SHA-256: 9db776247dea67a31feb15f3ec3efc397a3e073ee1cf8fc80facfe47ee9f089a
font_01_sfnt_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 1872 bytes
SHA-256: 0bb2955b5ca913a863097ea77f419106b897578fd6324294087ea51a982d7a63
font_02_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 10328 bytes
SHA-256: 7c71c040c9f3949b3f82053d8f8519e6aada0285d128ed60b6a5c6a31d478009
font_03_sfnt_off00010924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10924 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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