Malicious PDF — malware analysis report

Static analysis result for SHA-256 544cdc0d1169dfe8…

MALICIOUS

PDF

72.9 KB Created: 2021-03-04 08:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b1310a95bc54facca073e88a5a1a55d6 SHA-1: 4b6968dcc68f86a65e3e735a147240bbbc193c12 SHA-256: 544cdc0d1169dfe8d80b97174220d110b5d5fb75c788670481b96ccdda11006d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that point to disposable hosting and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=the+hunger+games+catching+fire+finnick PDF link annotation
    • http://andyhongdigital.com/game_of_thrones_book_set_1-72m19u.pdfIn PDF document text
    • http://deemonatrafik.xyz/friedland_type_4_doorbell_manuali6f1s.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/0ccbb2ebf4.pdfIn PDF document text
    • http://quickstore.pro/130481765911u4m6.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/666_unblocked_gameshfshy.pdfIn PDF document text
    • http://justiciaforjustice.com/14732005842q60be.pdfIn PDF document text
    • https://divuvefa.weebly.com/uploads/1/3/4/7/134759037/guxoxazidirem.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/Uib9iuL/mine_jump_3d_unblocked.pdfIn PDF document text
    • http://edaruzal.xyz/34754475226jhlbe.pdfIn PDF document text
    • http://oyuncuxx.com/841433952457r4uj.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/cicY2ie/wma_music_player_for_android.pdfIn PDF document text
    • https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/3333101.pdfIn PDF document text
    • http://alisaborodaenko.design/tinijelevagisohtwbh.pdfIn PDF document text
    • http://urott-hu.com/diluxaluviroforapezui4u2.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/hff37gc/judewunasukajarirunejaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/katalog_cat_avian.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 5276 bytes
SHA-256: bcabee8c1289cf43e525f2bd0202b74c366a328f54b06a1436708fad6d907b19
font_01_sfnt_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10360 bytes
SHA-256: 258b01054f87dfc061e0e8c543ddd1965146ed8d416b20d450e10e877fd8e3e8

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