Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ee8846e83fbb90…

MALICIOUS

PDF

66.6 KB Created: 2021-02-16 08:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4d267890a253639d10bf2fc0fdc7ac9b SHA-1: 648713d5c452bf1aa031d859f11ce2e0a2b382dd SHA-256: 10ee8846e83fbb90b7f4fd6d0576c5189aca98779dd8ba712f41fd6e24e35b52
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites.

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://maypoin.ru/123?utm_term=thule+bike+rack+attachment PDF link annotation
    • https://cdn.sqhk.co/modonasuje/aLkuggZ/xafisava.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/lghwPQR/jungle_adventure_sims_4.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/hhfwidF/abyss_of_empires_the_mythology_cheats.pdfIn PDF document text
    • http://ses-paypal.com/8174777421dq3gl.pdfIn PDF document text
    • http://jadebey-x.com/block_strike_hack_apk_5._8._66v65r.pdfIn PDF document text
    • https://cdn.sqhk.co/didowaba/5NQ9b8x/dragon_warrior_monsters_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/G5i4Khh/rosibutonodof.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/6ibg6cC/17201046408.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/i2sjbj0/we_all_get_lucky_sometimes_lyrics_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/Vjfghja/guberagofebagu.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/3bggiin/17794880288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rafelisugamiraw.rf.gd/kiluvibodel.pdfIn PDF document text
    • http://madanekobovuge.epizy.com/kojodepiwuruwif.pdfIn PDF document text
    • http://peragodifi.epizy.com/hollywoodbet_dream_guide_lucky_numbers.pdfIn PDF document text
    • http://gufaxepelirub.rf.gd/fifty_shades_of_grey_2_soundtrack_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/filarevazinurezumiwilaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/data_structures_and_algorithms_udacity.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_off0000cae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE9 5016 bytes
SHA-256: 85f6bca14a66288352cd637798f78796c20af00aa405c0915819802c2f130009
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 9884 bytes
SHA-256: 67edfa89b33746ee091a9e695a5c052b501b7ff5e9505e9fb25298e91482201e

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