Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddc8e6070f3a6c3…

MALICIOUS

PDF

79.4 KB Created: 2021-02-14 05:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 39adf3af6b355a509bbe30e6c1ea0aa5 SHA-1: b0188907b699528d5ebe7fcbc3bd6943897e90d9 SHA-256: dddc8e6070f3a6c3f757a101021e15bed2a060c591c6a8bd348c22836c456761
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with many pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment, likely leading to further compromise.

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://jottigo.ru/wix?keyword=ffxiv+armorer+leve+guide PDF link annotation
    • http://verifedform.com/babette_s_feast_full_movie_freedhsdz.pdfIn PDF document text
    • http://uspeh.icu/danganronpa_weight_gainssvf6.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/ha855gc/sort_filter_table_javascript.pdfIn PDF document text
    • http://sfhgfje5df.xyz/cruise_royal_caribbean_international_stock_priceyl4xv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380531/normal_60095450d9e65.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/bgj5Fie/elements_of_design_color_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/gizadomoto/hijgeUo/zepeto_background_room.pdfIn PDF document text
    • http://merishwheelrecords.com/pefozeturipeleroduxolonia8h6j.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/yjjhfhh/2048_kitty_cat_island_mod_apk.pdfIn PDF document text
    • http://appletopshop.ru/csgo_commands_for_1v19n941.pdfIn PDF document text
    • http://ig-socialmedia.xyz/54121360620d5vgl.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/bSjcegd/last_minute_hotel_deals_midtown_nyc.pdfIn PDF document text
    • http://circus.market/fuzzing_brute_force_vulnerability_dircfd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xotomisen/84299655581.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/assamese_bihu_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/backgrounds_for_photoshop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/munuwiwopuboselufid.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_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 5132 bytes
SHA-256: e4504b1e7c26aa3552f815f1d149f28e49db649b6d69911852653dbdf707ad55
font_01_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 11212 bytes
SHA-256: a831124d7af95fd8ff2b83c5826f92d93aececcf27cbc2f1d5ee37a0f479c6cf

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