Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfe01a038f121b0…

MALICIOUS

PDF

80.0 KB Created: 2021-04-20 08:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8535609553086460f249727e9d226a33 SHA-1: d6e5a806639b579acabc3d837d2cd99712aab8f9 SHA-256: 2cfe01a038f121b0601cf8ef19b274fc320faed61a10d5f344af628e644201d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on link farms, indicating a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=hp+elitebook+8540p+drivers
    • https://cdn.sqhk.co/sabiwizi/Pgjt4hj/teluluvenagopujuwuxapubam.pdf
    • https://cdn.sqhk.co/bamazaludez/hchb0ic/43456753949.pdf
    • https://cdn.sqhk.co/govulasem/DQhehVP/65882105027.pdf
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/67938c.pdf
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/6767284.pdf
    • http://sumumepiwi.iblogger.org/best_cloud_atlas_quotes.pdf
    • https://cdn.sqhk.co/refevebux/fqZj1xk/gorilla_adventure_games.pdf
    • https://cdn.sqhk.co/sarunasol/2qgdKdJ/99339717349.pdf
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/455304.pdf
    • https://cdn.sqhk.co/remudejifi/jayjbhc/kadimetunijatotumepafoti.pdf
    • https://cdn.sqhk.co/woleparos/6jjhUiR/stack_jump_crazy_games.pdf
    • https://cdn.sqhk.co/nobixapo/jcbLxlo/kikoxibakukagoxuvig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_a24bf67e164c4d6387be9b84d10dacf3.pdf?index=true
    • http://zuvetimimu.rf.gd/archero_apk_mod_1._1._4.pdf
    • https://s3.amazonaws.com/taturi/62335095187.pdf
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_6c9f31bbaa474044ba555cbf43065086.pdf?index=true
    • http://beduxuluwuniva.rf.gd/37536702421.pdf
    • https://s3.amazonaws.com/zabevog/how_do_you_say_but_yes_in_french.pdf
    • https://s3.amazonaws.com/ruzumeb/23278337486.pdf
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_d95ca5625d874056b242eb8032d6ae7f.pdf?index=true
    • https://s3.amazonaws.com/bupesejirijejus/92901308810.pdf
    • https://s3.amazonaws.com/zuniverijesud/xuxazogejaxiweroso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec83.bin
a1561ebe09badc9e591c33bbd88edfaedb56412f07c8d74aa8f9ad2129d083ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 5196 bytes
font_01_sfnt_off0000fe48.bin
e583c0c1e4fc98215934711cb9f27abbc3bc6c56a54b0269c3bcacf9ba71de1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 11112 bytes
font_02_sfnt_off00012434.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 4324 bytes

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