Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e31127298c44ae…

MALICIOUS

PDF

89.7 KB Created: 2021-05-25 00:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: df98e54f3a57013c163ddddbc4c6748e SHA-1: 1b3e34c62dd4cdeec228ca73d9e2b7b2c5aea746 SHA-256: e0e31127298c44ae993654f9a35a998ee45fc7d5d29b4f94b8481c99b731459f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to exploit users by presenting deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://golowaki.ru/strik?utm_term=shark+tank+mexico+capitulos+completos+temporada+3 PDF link annotation
    • https://jonaduxito.weebly.com/uploads/1/3/1/3/131384171/rimorara.pdfIn PDF document text
    • https://xitupigavogom.weebly.com/uploads/1/3/4/4/134474669/fevudipuxes-zavepizo-femidudez.pdfIn PDF document text
    • https://bikiwilusi.weebly.com/uploads/1/3/4/5/134512037/06219c.pdfIn PDF document text
    • https://vejugowe.weebly.com/uploads/1/3/4/5/134506523/gomefi-xorerufetadebo-garuruw-galil.pdfIn PDF document text
    • https://nowatipuzovatob.weebly.com/uploads/1/3/5/3/135397830/5d81760.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/65dbed41b.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/c7a03465d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_6068e10a5a87a.pdfIn PDF document text
    • https://mogasijukunuv.weebly.com/uploads/1/3/4/0/134042787/188473.pdfIn PDF document text
    • https://sewimewomem.weebly.com/uploads/1/3/5/3/135323120/zapotewajil.pdfIn PDF document text
    • https://gojulujowavid.weebly.com/uploads/1/3/4/8/134886085/7056011.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/waxafuvi.pdfIn PDF document text
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/mumafuj_bagosaja_babaraj_mopusam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_605ad89c77093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_601b7cd27a8f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18448437-2d7e-4f88-b54f-75973dcc8432/international_environmental_law_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fb86e4-5e2a-467c-85d0-218855205cf1/what_does_it_mean_to_dream_of_being_heavily_pregnant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6231af8f-0cd8-43dd-a042-b05b6273a1ff/kenwood_kdc-bt362u_device_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff688c9-d410-410f-a85f-ed0eee79c46c/dajamabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b20806-7ec8-4d28-952f-74f6622e011b/foxuzuxedeviwojugivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba02e58-d5e6-4838-a8e2-e5b284ab2e1a/what_is_chuck_seitsinger_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48fcd75-d616-40ed-8e9b-e4fb9f01308b/zirupemile.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B6 5712 bytes
SHA-256: 52b474b4a229538b6798c33bbec8c98683dd132139fc709af921c3c80bbccdf8
font_01_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 13356 bytes
SHA-256: 452227fc605941cf9cf938e175bb4edb8abd82fd364351412bcb728848cbe992
font_02_sfnt_off000141c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C2 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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