Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a46a5eac6d6fb15…

MALICIOUS

PDF

91.2 KB Created: 2021-02-16 04:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f2b3afdc7ed7a020dd03289f56e9b7f9 SHA-1: a40a6f7259d9dd8c2a44a307b801d257fa1b259f SHA-256: 1a46a5eac6d6fb15a2ba3d89bc4ddbc99d1c7e27f0898a323301a75705cc69e8
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious redirector pattern, likely intended to lead the user to a phishing or exploit site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=how+to+heal+from+fear+of+intimacy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481402/normal_5fe630bed19cb.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/best_survival_kit_backpack2n4ij.pdfIn PDF document text
    • http://nukels.xyz/pirates_of_silicon_valley_720p_downl0gdj5.pdfIn PDF document text
    • http://liko-sneakers.com/rewodebiriupse5.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/1414007276765tw6.pdfIn PDF document text
    • http://nufudotaruja.iblogger.org/komuxiwelabisiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5fcb58fcc816a.pdfIn PDF document text
    • http://constructionhouse.info/462150445677hyr.pdfIn PDF document text
    • http://frasqen.online/77288622835tflv9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470040/normal_5fcf9f4d130bc.pdfIn PDF document text
    • http://yoptan.space/80290949366dt5pm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_60275ba62c8e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_602b06d1f3c8f.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
    • http://luvibiw.epizy.com/arrayadapter_android_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/chemical_bonding_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/30791552244.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/27616773464.pdfIn PDF document text
    • http://gezuvemun.rf.gd/balu_telugu_songs_com.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.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001110b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 4884 bytes
SHA-256: 4a29c7c3aac3912c524ba9f38d2ee04dff5a8bfb429d94c7af31d1a539e41764
font_01_sfnt_off0001218a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218A 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00012ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CED 10500 bytes
SHA-256: 49c1942ca70d7ce5b9e7c51d835ca41a72090a24f7c5196c200116f36d63b518
font_03_sfnt_off000150e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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