Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7eb33280243ff3…

MALICIOUS

PDF

76.5 KB Created: 2021-02-27 23:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1c071a4db2f695a4de9cbb58690115b7 SHA-1: 66c2af9a98cf57a61e12dad22e4f8c69c8e4380b SHA-256: 0e7eb33280243ff36d514561c312fc16ee2c4b8d7e24d8c14459134db98e051c
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's a phishing or trojan delivery mechanism. It contains a large number of embedded URLs, many of which point to disposable hosting and redirector infrastructure, suggesting an attempt to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains text related to search queries, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/aws?utm_term=how+do+i+fix+the+subwoofer+on+my+samsung+soundbar In PDF document text
    • http://vekisonoloze.sportsontheweb.net/how_to_make_my_iwatch_waterproof.pdfIn PDF document text
    • http://jovekigapovokeb.22web.org/the_game_1997_movie_free_download.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/7569069608.pdfIn PDF document text
    • http://kuvonej.iblogger.org/niximi.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/65883707576.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutilokip.epizy.com/bye_bye_babu_dj_naa_song.pdfIn PDF document text
    • http://zebinopo.epizy.com/dugogavubimoxavawiwukeda.pdfIn PDF document text
    • http://titugol.atwebpages.com/74585586809.pdfIn PDF document text
    • http://somukagokololu.rf.gd/tratamiento_de_anemia_megaloblastica.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/1572717673.pdfIn PDF document text
    • http://tokofom.rf.gd/bagiba.pdfIn PDF document text
    • http://dubovusikiwafaz.epizy.com/mitalifodilu.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/mawonif.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/66152883069.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/kafejokulorugaker.pdfIn PDF document text
    • http://ponazuxunuruko.rf.gd/salasaral.pdfIn PDF document text
    • http://rurufasejevexen.epizy.com/5288538.pdfIn PDF document text
    • http://guputawa.rf.gd/terraria_cultist_boss_guide.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/69098294228.pdfIn PDF document text
    • http://bawujirilo.epizy.com/b_tech_movie_malayalam_mp4.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_off0000ec27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 5652 bytes
SHA-256: d4be2ff84d18fb300db22155293724d97445713841ce2f0802b87b5b9b71ee03
font_01_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 10904 bytes
SHA-256: e2acfa97db4c2724aa78372c9e7f282b0619b03eaff12e9e60038f05bfef879b

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