Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcc330fb0fd8caf…

MALICIOUS

PDF

75.3 KB Created: 2021-05-09 23:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 457ca8a7f65ab42c5d2254c262f3dc79 SHA-1: 771c7f07c3e5676c33f2c300f401d87c4a2d0f99 SHA-256: 3fcc330fb0fd8cafdba087840b84d68c0aa3b1ef3ff306bb5f9d798d40ba998e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=why+does+my+dyson+keep+pulsing
    • http://bujaxodu.iblogger.org/the_f_formula_flirting.pdf
    • http://getcabinets.xyz/business_management_for_dummies_free_downloadkcxvm.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/zuwawikuzafu.pdf
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/5727486.pdf
    • https://woxawilafuzuve.weebly.com/uploads/1/3/4/6/134669094/27d99791b3f836.pdf
    • http://7lessons.site/teel_paragraph_worksheetq527y.pdf
    • http://mozujana.22web.org/mini_projet_capteur_de_temperature.pdf
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/983814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://banobozibijur.epizy.com/diabolik_lovers_manga_espaol.pdf
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_39f76e1590a247ad91258fac7209e5d1.pdf?index=true
    • http://fogalefudomuj.epizy.com/99163782567.pdf
    • http://xokeraje.rf.gd/vakik.pdf
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_324b9f4241724489a4cdda35869c80e6.pdf?index=true
    • http://fadojogepu.epizy.com/a_startup_enxuta_gratis.pdf
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_e17d859b883f40d1b05e13c020e235f2.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_ff422c1efe454fe4b60d3766c5a79994.pdf?index=true
    • http://vubalek.epizy.com/kenmore_washer_70_series_model_110_parts.pdf
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_8d80fb3278584b48ab5babd5f838fff7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea80.bin
e7353fc9812c2dc55bac403ba61113cf9a790415a78208ce630f156bdb664f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 5244 bytes
font_01_sfnt_off0000fc4d.bin
11a8673afe67febd80f2d0c513b69fe47b0bc7de69b3026f61246724c0f4f605		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 10464 bytes

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