Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8caa97c15b631c…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 20:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1387b664e01525de687a8798ef2b2d9d SHA-1: a9c1aa8b83352364a77a1186e7e8a0ba858b0fec SHA-256: ae8caa97c15b631c7f6bed6351fdd9b1db2f73cba220074a18ee33e4ad20a7d4
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 embedded URLs, one of which points to a domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of PDF_URI and EMBEDDED_URL heuristics, along with the suspicious URL, suggests a phishing attack designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/award?keyword=bayesian+reasoning+and+machine+learning+david+barber+pdf PDF link annotation
    • http://nukowivoxom.iblogger.org/c_template_specialization_in_cpp_file.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/arc_back_exercises.pdfIn PDF document text
    • http://gativatur.getenjoyment.net/89853754590.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/graphene_oxide_fundamentals_and_applications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_606435bfb8f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_601aa6a1a2c9f.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://uploads.strikinglycdn.com/files/9a0a0f11-3ad4-4b5e-9e8d-ffa8a3cb1b77/how_to_cook_a_steak_on_the_stove_with_butter.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/where_can_i_get_premarital_counseling.pdfIn PDF document text
    • http://viwukapatajomi.rf.gd/35852355678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7263d309-5f99-4dd5-a67d-c8020276ed58/living_religions_9th_edition_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/formation_of_carboxylic_acids_chemguide.pdfIn PDF document text
    • http://nosikugabuvisal.epizy.com/niall_horan_flicker_full_album.pdfIn PDF document text
    • http://sexuvariv.epizy.com/18840293457.pdfIn PDF document text
    • http://zorumiwopa.rf.gd/18771172948.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/what_was_the_vote_to_pass_the_affordable_care_act.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/the_white_tiger_film_ending_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7231ff-d5eb-49e2-bd6b-b3a88506de69/sagowuzojivupekotekatag.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/40k_8th_ed_codex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 5628 bytes
SHA-256: 22c2689bce9c550f8db46edf292e23a8f63bb30a9e676ff16c079bf16a7dcef2
font_01_sfnt_off00011010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11010 11768 bytes
SHA-256: 8477b22ed09779acd1d735eeec9b494ae56fb9e2a206f6f4abe2a298a292e62c
font_02_sfnt_off00013622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13622 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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