Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58ce4089d4000f1…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 14:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 36bc6d1a52ae406296dad89f93e019c2 SHA-1: 826784fa40eab001c819498ed93a59be34b6f6d6 SHA-256: c58ce4089d4000f19fecb9c7d3791563b2671e0ee35e4fb8f1ff3bd2da3fcc8b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though truncated and obfuscated, appears to contain search query-like text, further supporting the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=how+to+replace+blower+belt+on+maytag+bravos+dryer PDF link annotation
    • http://lamaded.mywebcommunity.org/85037165685.pdfIn PDF document text
    • http://pl50off.info/udemy_certificate_samplewyx69.pdfIn PDF document text
    • http://omerkatanalp.com/name_of_body_parts_songjz5vg.pdfIn PDF document text
    • http://usechambre.xyz/excel_vba_find_column_letter4uqy5.pdfIn PDF document text
    • http://roskycnmx.com/staten_island_street_map1qsaq.pdfIn PDF document text
    • http://zootime.store/binovijavndbd.pdfIn PDF document text
    • http://hookup153.space/blue_letter_bible_acts_5_study_guide2li4x.pdfIn PDF document text
    • http://gonzo-3d.com/best_prank_call_app_downloadvs9uv.pdfIn PDF document text
    • http://radanews.site/52078535247r9wjb.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/rijuxufofa.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/duwiwumo.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/72861547111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/9642194688.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/multiplication_tables_from_1_to_30.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/what_is_a_group_theory.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/ge_spacemaker_over_the_range_microwave_removal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE16 5488 bytes
SHA-256: 3cb75b2fc209533461a4dd02352c66fb21574e890d1953658be592f67816130e
font_01_sfnt_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 10536 bytes
SHA-256: ed61ac3df6250044889d6f197a744ec92c89479f924159d98b2ea70ecf7b9506
font_02_sfnt_off0001049b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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