Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c91d466a2b9ae65…

MALICIOUS

PDF

75.2 KB Created: 2020-12-22 21:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 13745293f5ce515c2b28fa960f933961 SHA-1: 46a1aea62433caab911a4b7f2b148b78924b3811 SHA-256: 6c91d466a2b9ae65415ad14d13b43bec5bf859488791786e81c813377d422407
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm with numerous external URLs. The presence of urgency language suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=pokemon+fire+red+save+file+gba+emulator PDF link annotation
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/kosolawelota.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5fcfeccd6149e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5fd192259d0e4.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/faserubafa/download_a_boogie_wit_da_hoodie_bleed.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/anaconda_2_full_movie_in_telugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf89b1491241adc454a09/1606219931353/paint_the_town_december_script.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/rukovegaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/mobile_network_signal_booster_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/zafanoxukuvuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/46169414008.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/ravezireveloxaxeba.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/28141574032.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/business_card_maker_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cb9efc603311fbf61aa6/t/5fcdeaf7d336b863f0e5a8cc/1607330551327/kumujivigegonutodej.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_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 5492 bytes
SHA-256: 85e12048094e2092b895c4c306c1b2f90287e9be531a9771846416755a336397
font_01_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 11832 bytes
SHA-256: 702fb9f277f9b264db74e9d9b5cbb9b1e114988c5d48e52ed89c5cd53bb7be34