Malicious PDF — malware analysis report

Static analysis result for SHA-256 8146abea2a2e6804…

MALICIOUS

PDF

125.5 KB Created: 2020-11-30 02:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 15c64c88cc087e1d23cb01acf69c922d SHA-1: b79b815fc4e75ec3b3cf208ddbf27d2c0370c0f3 SHA-256: 8146abea2a2e6804135a55270d7f737ec714f6bd9fa0222071ad65d7b5601cd3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links, including one pointing to a suspicious URL that appears to be part of a lure for downloading a Minecraft APK. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9448

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://traffnew.ru/strik?utm_term=minecraft+12.0+pe+apk+latest+version+1.1.0.9+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5f99f03d2d840.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/zutewutekatujajok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5f934a16b753c.pdfIn PDF document text
    • https://gebikatewizej.weebly.com/uploads/1/3/4/3/134311033/8949483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/guide_147_old_town.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/android_browser_to_streaming_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/ativador_office_2013_professional_plus_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981d0fa1-2e6c-4427-9a46-2bca1b1eac2c/bell_wifi_pods_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/eclipse_cdt_tutorial.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC9 3480 bytes
SHA-256: 7b5333c8d2375fbc88bcadb44e5db4b1c70e88524c344d577ac26caf7e3aee17
font_01_sfnt_off00017a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A47 5884 bytes
SHA-256: 470ef5fc01544d4c5aa6ab0df20e13d677efe9584e7ecc8406a631f99e05f452
font_02_sfnt_off00018e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E7D 9088 bytes
SHA-256: 4e2a9a8347c25f5a3f2ba5246b070e94975b1a171ed56ae5c33a3272d239cf82
font_03_sfnt_off0001a79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A79A 12444 bytes
SHA-256: c0e5e6ecf4067b8d980cc51f1330c8514a1cb00483f78bbf11647846726fa7dc
font_04_sfnt_off0001d28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D28C 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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