Malicious PDF — malware analysis report

Static analysis result for SHA-256 b607f3cd84da4eed…

MALICIOUS

PDF

95.8 KB Created: 2021-02-07 23:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5eec5b84cbd8fb5da3c7824cca60bd0 SHA-1: 83b6d1677629bb6092fd7364ae94cf35060a08ab SHA-256: b607f3cd84da4eed68a6be1c165a0ee9731a22453a9e6d60d68bfde27468836f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a site offering free movies, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/123?utm_term=peliculas+online+gratis+en+espa%25C3%25B1ol+latino+completas+sin+descargar+2017 PDF link annotation
    • https://cdn.sqhk.co/sipebililofo/S3iemic/totiwunupagapelu.pdfIn PDF document text
    • http://wamepiguvoj.iblogger.org/16329388314.pdfIn PDF document text
    • http://maslovauto.ru/sagaxonumiwaffoa97.pdfIn PDF document text
    • http://lenudes.com/89480285958oj0z8.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/qwigTmJ/xigegido.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/hbggGgi/tiktok_top_music_ringtone.pdfIn PDF document text
    • http://reduslim-shop.site/smoant_charon_mini_manualcufqj.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/duQiDJf/wood_carving_tools_for_sale_near_me.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/domega.pdfIn PDF document text
    • http://zowefokixot.iblogger.org/telecharger_traduction_franais_anglais_apk.pdfIn PDF document text
    • http://emmetrix.net/creepy_don_t_touch_my_phone_wallpaperxj27a.pdfIn PDF document text
    • http://christinaanddavid2019.com/guided_imagery_meditation2oze4.pdfIn PDF document text
    • http://mexicotop.xyz/desperate_housewives_game_download_freehrsl3.pdfIn PDF document text
    • http://wuvigirigu.22web.org/mixotafajig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vukigopi.rf.gd/76546941860.pdfIn PDF document text
    • http://dulubuli.rf.gd/46688761778.pdfIn PDF document text
    • http://relurifiluxel.epizy.com/adobe_acrobat_pro_windows_7.pdfIn PDF document text
    • http://vujofif.epizy.com/63520194476.pdfIn PDF document text
    • http://mejovusemuvov.rf.gd/81824079739.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0001135b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 6012 bytes
SHA-256: cc082440901c33252c75e100e0428e59ceab04c56881dfd602843c4268bc8cc0
font_02_sfnt_off0001277a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2
font_03_sfnt_off00013154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13154 11856 bytes
SHA-256: 82063ec6a569de960dbe8c14e2706172255b403e08967306707eaf0b9d1f1ae4
font_04_sfnt_off000157d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D5 16152 bytes
SHA-256: 5bb2a7a6380d1dfafb539ecff73d32ebbe261088a673e400f34aca4fbad20734

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