Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e146021ed6d3868…

MALICIOUS

PDF

73.4 KB Created: 2021-02-05 01:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ba32413c3b9b735b8fa6075ed2aa8e26 SHA-1: 2cccb49b3390941583b00d3d561519b47cc3e4bc SHA-256: 3e146021ed6d3868ac1f7aa8b9fbd7ed3675c2b9a42526fb75cebcf0a7db56fb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=irobot+roomba+560+battery+reset PDF link annotation
    • https://jelugofinetala.weebly.com/uploads/1/3/5/3/135389066/nepezovumudirab.pdfIn PDF document text
    • http://fruit-ital.space/five_points_towards_a_new_architecturejhtza.pdfIn PDF document text
    • https://zinorenote.weebly.com/uploads/1/3/5/3/135349773/c1409f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_5fd98f70dcd3a.pdfIn PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/pumoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/gjhjkic/jodab.pdfIn PDF document text
    • http://itfamily.pro/guwupu0c8i5.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/hmYMjcA/72580298245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410956/normal_5fe312104f21f.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/juxasiseregewem.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/mitusapudejagepap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozopavo.rf.gd/l_anatomie_de_la_main.pdfIn PDF document text
    • http://lenawevurokolup.epizy.com/betternet_apk_para_iphone.pdfIn PDF document text
    • http://pofumitiko.epizy.com/90005667919.pdfIn PDF document text
    • http://didewuwu.epizy.com/free_residential_lease_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/18747013479.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_off0000e344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE344 5396 bytes
SHA-256: c0d091ee19cec6c1e4920c815fa6f69cbdfab25883d9565ade9278b9693e7f11
font_01_sfnt_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 10348 bytes
SHA-256: 5d518163597f96bf54c871aafb1b605ddb4af87d18d8a4fb9e3b3fc50da90bc6

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