Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fc6f643829560c…

MALICIOUS

PDF

76.1 KB Created: 2021-04-05 09:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 95d414852d70c4b1aae149f6a06e768f SHA-1: ebf8e63ec33c4002dec5860aa840ed0c87cedd93 SHA-256: 14fc6f643829560cd71fcbe8f376bdf2d0fd3420aedfd5f02e66627d2ad90708
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a significant heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, appears to reference 'dna replication worksheet answers', a common lure for educational or work-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://gimoguvi.ru/wix?keyword=dna+replication+worksheet+answers+chapter+17-2 PDF link annotation
    • http://stakingyfi.com/goxezokevaropuwaer9w2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_60524b360cafa.pdfIn PDF document text
    • http://yogait.space/82951096505z7f7e.pdfIn PDF document text
    • http://astrology-personal.online/8003800621552fs1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_601b6436f414a.pdfIn PDF document text
    • http://technodom11.com/what_is_dormir_in_english93029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6052dd2990a8a.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_603d7c2bee980.pdfIn PDF document text
    • http://dokumenty-kiev.online/eclipse_180_pro_mp3_playerkiilr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_601424541ebdd.pdfIn PDF document text
    • http://healthytrands.com/hackintosh_sierra_zone_guideg4t1p.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://zebrait.fun/what_kitchenaid_attachment_for_pie_crust623h3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_cea2a36cb3764c2bba5220f89d13659f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/camera_360_lite_vip.pdfIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_ca255e8701b24e6da9cce52a981e608e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/josatezapevajebipelaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/bloons_tower_defence_5_apk_free.pdfIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_2968cab710fd4275aaedd1215dcbbf93.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_f7c10cb2944543568d76019d675b3be1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/fire_cam_1080_battery.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_0a77f7b5c35d4e68a4b2c397be746338.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/kixupixajagitokomewe.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_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5472 bytes
SHA-256: 4a1f727893ec81ababba144399040e8f6d975ecbff8e024bb097a85aeb22ea23
font_01_sfnt_off0000ff21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 10496 bytes
SHA-256: 18ccf47275a666451c2da56cc2e24d6e8f0e303b9952926175b500fef3e8a433

Open this report in the interactive analyzer, or submit your own file for analysis.