Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe118addcd68fcc…

MALICIOUS

PDF

85.9 KB Created: 2021-04-17 09:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a2b4631200fbb773bda1f68c3c051acc SHA-1: 71452e1ed34d58418c85cc2699023715825522df SHA-256: 2fe118addcd68fccd2fd7675cd90b373c2403d43141fc96e39d05e4f9e0bbf51
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/strik?utm_term=reinforced+concrete+design+to+eurocode+2+7th+edition+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/sezogitov/hjqhdDB/funtime_freddy_sounds.pdfIn PDF document text
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/978e566.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/hfjigdp/brawl_stars_box_opening_clashgames.pdfIn PDF document text
    • https://buwirudoxux.weebly.com/uploads/1/3/4/5/134597973/60b0deca341.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/4955a7201c83be4.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/charbroil_gas_grill_burner_replacementgdwd5.pdfIn PDF document text
    • https://tevukebejesa.weebly.com/uploads/1/3/2/6/132695492/5402870.pdfIn PDF document text
    • http://rankingcoach-apps.com/how_to_get_your_stamina_up_for_soccer290mv.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/6381930.pdfIn PDF document text
    • https://tajidirubizev.weebly.com/uploads/1/3/0/7/130739153/jujajixe.pdfIn PDF document text
    • https://duwawituku.weebly.com/uploads/1/3/4/3/134306950/fee1bff8781.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/FPOgdhe/nawelepurifovakujerumak.pdfIn PDF document text
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/d7266c06.pdfIn PDF document text
    • http://g2am2e.xyz/wemixofunuzivumejofesanwqc0z.pdfIn PDF document text
    • https://tazabavirivagi.weebly.com/uploads/1/3/0/8/130814173/7986591.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/roravago.pdfIn PDF document text
    • https://sawebegiwe.weebly.com/uploads/1/3/4/7/134706463/8362695f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jivikone.epizy.com/97077133911.pdfIn PDF document text
    • http://ruzunol.rf.gd/jspdf_autotable_line_break_not_working.pdfIn PDF document text
    • http://baminitase.epizy.com/shielded_metal_arc_welding_process.pdfIn PDF document text
    • http://zefobik.epizy.com/acknowledgement_in_project_report_sample.pdfIn PDF document text
    • http://lenoguxeg.rf.gd/samsung_smart_tv_32_inch_series_4_price_in_philippines.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 5728 bytes
SHA-256: bc5f0d3916df53739a4a6b7b8e3fd6916adaeee00fb86a593bab262dad14e946
font_01_sfnt_off00010e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E74 10932 bytes
SHA-256: ed7248eed42baad280b1ad2228e64ae7c49bef168106d52d57f399c523ff19c6
font_02_sfnt_off000133e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E8 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15