Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dca7a9ce0ccb994…

MALICIOUS

PDF

77.1 KB Created: 2021-03-13 13:51:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1c7320014be0233d189106b1a3457fdd SHA-1: 1bd1d377382384a5bbf1bf3455279ab70ade8030 SHA-256: 1dca7a9ce0ccb9948b8918927760b0a87f59191c81467f18003bea6a65c676ff
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The document body contains garbled text but includes references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically. No scripts were extracted, but the presence of numerous external links suggests a lure to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/wix?keyword=dragon+ball+legends+mod+apk+2.9.0 PDF link annotation
    • http://mevakimuvu.mypressonline.com/little_red_riding_hood_story_original.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/jjjdfhd/lurifo.pdfIn PDF document text
    • https://cdn.sqhk.co/vekazedivipi/hhgdicV/vuwijadorafabiwezuk.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/shogun_2_total_war_units_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/JjgjjqG/11762244192.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/76073660500.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/hfTihhL/45890179776.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/gj2hejj/rc_drift_car_parking_competition.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/difvjaL/jawbone_up_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/c63ibji/adamantine_weapons_pathfinder_kingmaker.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/a5804a11-8ac2-4f27-a6a9-a40ae6b33f2d/tabla_periodica_de_los_elementos_quimicos_concepto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7351d16-157e-4626-bdfa-242ec3e945cf/13307235796.pdfIn PDF document text
    • http://temomij.epizy.com/economist_democracy_index_2017.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_94baffb28f254709b5c4aa1a846208cc.pdf?index=trueIn PDF document text
    • http://gobujabolonile.rf.gd/87000509257.pdfIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_4d79324320b34afcb1553b32612b774c.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_2f19a256f0c24de8b3c37231d1a1ca4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93d891e-24fe-46fb-b5fa-4adb1b2f8d05/8479828891.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_6fafaa16ff5e43c2aee54c8c9589e8b4.pdf?index=trueIn PDF document text
    • http://xinirujoki.epizy.com/ar_190_11.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_af0695c0283c4d759c2eef2204edf54e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd2b8be-9d99-4bef-b885-34b9194339a9/pioneer_vsx_530_k.pdfIn PDF document text
    • http://ribikusilotagod.rf.gd/1807145694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524d78eb-2745-4c07-bd82-ca5d3ce69edd/xexamefuju.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_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 5944 bytes
SHA-256: 77033d45d3fd48abf2dcd99adbb0362bac797dff91dd2053e3660c2dc954ef15
font_01_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 10304 bytes
SHA-256: 62fffd3f3d0ebb39d1a391e50ffc90c09a7fd11999ad7f797a2888c6b0c99798