Malicious PDF — malware analysis report

Static analysis result for SHA-256 a860c14ce61ee1f7…

MALICIOUS

PDF

79.2 KB Created: 2021-03-31 08:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 681bac0b8adb8a25f39b5e1ddaf7fcd6 SHA-1: 5733eeb1efce905afa844f2509bbaa1c6ee6ebd4 SHA-256: a860c14ce61ee1f7e1adcb0a63046b396801a947c93264640a4d8fad00aa7196
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/award?keyword=water+pollution+project+pdf+file+download PDF link annotation
    • http://fisareboveda.getenjoyment.net/levibinad.pdfIn PDF document text
    • https://risebezisenozo.weebly.com/uploads/1/3/4/3/134375164/b348d.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/2144666.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/moselafokekopapuva.pdfIn PDF document text
    • http://prognoz-football.club/lulusebacvakv.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/pofobetovat_nitadutuguwafis_nebodesufozaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_601b3c2021afd.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/57706559192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_603e64b8129ee.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/antiepileptic_classification.pdfIn PDF document text
    • http://opsnatur.fun/thompson_center_hawken_54_cal85rlj.pdfIn PDF document text
    • https://xuzitimezavut.weebly.com/uploads/1/3/1/8/131856372/bibomorebibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_6043896bdd111.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/37065fca-8647-45bc-828b-951f56dc584c/48297577860.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/bejuvazikizupuwazategemef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fff0ae3-4ad7-4b74-b2b6-7f60536788fa/ibm_and_the_holocaust_youtube.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/algebra_color_by_number.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/japanese_tattoo_art_books_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae08dc3-05b3-4fe7-be77-de14cf4238d6/fish_hook_knot_braided_line.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EF 5152 bytes
SHA-256: cb6e38825e278ec367b975045432d14aa94dd99bc949f73c7dc8d3cc7944334c
font_01_sfnt_off00010aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA1 10660 bytes
SHA-256: 56c1096b2eac59e8d77da8a78cd95fdc61017c5d90d77a6399c6b3d6a2a0b3e4

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