Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07c758ea019ecc7…

MALICIOUS

PDF

70.5 KB Created: 2021-01-17 14:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e8c8de3418b7c763c5a38e36af71fe0b SHA-1: bb8683f83bcdd82b4b1d883a5c6126389444f1c9 SHA-256: e07c758ea019ecc7b0c21edf1ce6a3aab909c1d55f721dea8e2a0eafba0c2bf7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a spearphishing attachment designed to redirect users to 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://traffking.ru/aws?utm_term=coca+cola+sustainability+report+pdf PDF link annotation
    • https://cdn.sqhk.co/migazajigum/l6cnheq/impossible_quiz_answers_74.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/7363296.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/pugofabo-dologoruwiz-xavofiwukajuzi-tunesutowib.pdfIn PDF document text
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/xevusananu_wexuzisozulo_bizujuwulev_vusosoniroxodal.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/nikapuvoponuzamavitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5f9b1a88bf1f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5fc852f83a74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453754/normal_5fb4071042256.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/68fee7a133cbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fca82f8806ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5fb7a7de2f578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387718/normal_5ff55c1f55ba9.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/pevarijidasalop/14880661190.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/kotixukulamukinamosinu.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/population_growth_graph_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/matejo.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/google_play_store_stuck_at_99.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/angielski_b2.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/pifuvurufadunixefij.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/30169626341.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_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 5296 bytes
SHA-256: 5fb34ddaeb104dbf6dbaaa3c59d013ca0de7c1653300fe7745de446a9fd4a8d8
font_01_sfnt_off0000e681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE681 11224 bytes
SHA-256: 818c60f8425dd37e532f539314ab1e04e008e9d9ca1fbf0ed6d0ec64181684db

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