Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db9acf750c2c857…

MALICIOUS

PDF

167.9 KB Created: 2021-03-08 12:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 295d470b70c59642749e556b330f9381 SHA-1: dc6b940b5a8ca95720b416a8bf83636d17bfd9fa SHA-256: 2db9acf750c2c857c85da95259314d6115f817dd3f4cceba487ef0fb4d8b5e95
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 high likelihood of malicious intent. The document body, though truncated, contains keywords like 'Lebenslauf template englisch' suggesting a lure for job seekers. The presence of numerous external URIs, many hosted on disposable domains, points towards a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm designed for SEO manipulation or traffic redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://kuzutuzo.ru/123?utm_term=lebenslauf+template+englisch PDF link annotation
    • http://qwertyujg.xyz/meaning_of_neighbourhood_in_marathijx8hq.pdfIn PDF document text
    • http://dapovevi.mywebcommunity.org/neguvej.pdfIn PDF document text
    • http://idslim-italia.site/logo_quiz_level_40_answersvw7yk.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/107a43ced5c6.pdfIn PDF document text
    • http://laitlabs.pro/dunonatakonipetavaju3zw87.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/53a3888697397f.pdfIn PDF document text
    • http://autocredit.moscow/old_easton_aluminum_arrow_chart3yl1v.pdfIn PDF document text
    • https://xenimaxifoja.weebly.com/uploads/1/3/1/4/131483144/baguwav-junan-tilekujifadin.pdfIn PDF document text
    • https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/75076.pdfIn PDF document text
    • http://usesol.xyz/future_baby_girl_names_2020_blackeq5wl.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/early_transition_metals_characteristics.pdfIn PDF document text
    • http://big-ita.space/garmin_etrex_10_manual_espaolp7z17.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/how_to_dilute_directions_hair_dye.pdfIn PDF document text
    • http://shoop-fk.ru/3d_heart_mobile_craft6xzv1.pdfIn PDF document text
    • http://clubstore.pro/what_are_the_12_elements_of_music_and_their_definitiondqgef.pdfIn PDF document text
    • http://klosheff.xyz/is_gene_therapy_ethicalxfsre.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/934559.pdfIn PDF document text
    • http://iclod.tech/34116174798ixmnz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nonulalomijowo.epizy.com/ti_83_online_calculator_free.pdfIn PDF document text
    • http://kobinegugagikag.epizy.com/lopi_wood_stoves_manual.pdfIn PDF document text
    • http://lemiwiwivafato.rf.gd/57409659702.pdfIn PDF document text
    • http://xulufavuso.rf.gd/burnham_grammar_school_sixth_form_open_evening.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/1436717040.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23356 5416 bytes
SHA-256: 3f1e0171ef2a039800e1cc9bc9a6180e73735c002428fbb40be77a26231c02fc
font_01_sfnt_off0002459e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2459E 2308 bytes
SHA-256: 15c6a6fbe5e26b05a4eaa6c23c16620053a5aeafb5e9b535f27cfe32071280c6
font_02_sfnt_off0002501d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2501D 12552 bytes
SHA-256: b81a49efb734eb0669b58a61727dd7915ea099278deb0c54671b883869ec1957
font_03_sfnt_off000278e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x278E0 16660 bytes
SHA-256: da32b9b67ffbd2907b0a4a87ce2004cea7957995bd0623813df80742b24f0d78