Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dddc2a5fe7125f…

MALICIOUS

PDF

84.5 KB Created: 2021-03-08 06:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b528c6fcaa3fec37c50df97cf81c3b7c SHA-1: 0ad399ec3f151cb0bcbb0623099114ed9e772da4 SHA-256: 87dddc2a5fe7125fd3ca4b12e0ed7b8464bc1ffa862ca92a5b517a67b89e7897
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, including one to 'golowaki.ru', suggesting it's designed to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=how+many+calories+in+fruits+%2526+vegetables+chart PDF link annotation
    • https://likemopulijufo.weebly.com/uploads/1/3/0/7/130739197/92d5ba625866.pdfIn PDF document text
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/e19423e1.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/nomejodolonobar.pdfIn PDF document text
    • https://pabitunevogozut.weebly.com/uploads/1/3/0/7/130776295/tateze.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/biotransformation_of_xenobiotics_detoxification.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/571160.pdfIn PDF document text
    • https://sixikubirosepup.weebly.com/uploads/1/3/3/9/133997641/xovuka-tudodivebuv-lisolonemefopof.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
    • https://s3.amazonaws.com/jifedefujodu/62898081365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46be3c74-551c-4c8d-ae8b-d785a746a625/rebijanififo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0736b50d-5818-4932-93ff-438ec4459df5/digimon_world_piximon_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/kasodewolimajini.pdfIn PDF document text
    • http://mexowotevofo.rf.gd/zozojusojinifulomudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236acef1-36d9-46d6-99ea-6f9e6da85fc2/zoletis.pdfIn PDF document text
    • http://wewiligeva.epizy.com/how_to_get_rid_of_pimples_marks_on_face_home_remedies.pdfIn PDF document text
    • http://kololujes.rf.gd/ethics_integrity_and_aptitude_book_in_hindi_download.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_0b1d1d3d6245416dacf253a61c59e56b.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_7d112471459643149c00687bec297a3d.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001002b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002B 5064 bytes
SHA-256: d4d3fceabd0cc3728725324632c1e11853d35f9a7d23bbe82b9be18d9c22cab0
font_01_sfnt_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 10936 bytes
SHA-256: 2900052625220f4eccad6214940ae76c55dc0cb029171706b034b107ad869435
font_02_sfnt_off000136bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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