Malicious PDF — malware analysis report

Static analysis result for SHA-256 016aa998c7311d5e…

MALICIOUS

PDF

70.0 KB Created: 2021-09-28 10:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 94b450609aa286425f3eac6e3d96e6de SHA-1: ad189435708be131c39106df9c338afb6af9e7dd SHA-256: 016aa998c7311d5ed553e8cfbd255d9e30e2547e593412b2b0cc37fdebceb84a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting and appear to be part of a link farm. The primary function seems to be redirecting users to potentially malicious websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=how+do+i+change+my+region+on+my+android+phone PDF link annotation
    • https://rajakeempat.com/contents/files/fadabinasepifo.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/91118007112.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/32128731620.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/75616580983.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16142989152d11---jilipovi.pdfIn PDF document text
    • https://goodline.by/userfiles/file/rerotarowivavomamaf.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/86178726851.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/jemijosubumuwinut.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613444a820c99---kivarufuridibugujade.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/pepasitovujamiwax.pdfIn PDF document text
    • http://delve-cr.com/uploads/dazew.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210928_838C4B9C6ABF5F16.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151b0de8769b---18272326063.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/46661306417.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/notekagikujof.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/81063267343.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/94992784847.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/kipaxezijubetudasujuraj.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/wukonajifemujesipif.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/66294856094.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/fadawigabuwijitasezajub.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/diber.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/xitezoxelogedotonedox.pdfIn PDF document text
    • http://psychologadamczak.pl/userfiles/file/xigojepun.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/xariforasitafiwirawiwerut.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/lesaxonidokozofobuj.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://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_off0000b220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB220 10840 bytes
SHA-256: b5681943df7e7b4f716372ffd06def63ed79dd0b1f3cded69ed05b988c94728b
font_01_sfnt_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 15720 bytes
SHA-256: c08586b73119d795c0ea538cb784ebe69d2205093502481423e70735652df3d2
font_02_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1