Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea362a14fbaf6384…

MALICIOUS

PDF

72.6 KB Created: 2021-03-22 14:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e2e7d5bce3d96dd41c4b0cf0db9c74eb SHA-1: a15766b3f25b108e51f6af8f794ffd321bfc7642 SHA-256: ea362a14fbaf6384386c8cc0235a8294b2ead162374f9109ec5a4d0a0812924d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics 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://fokemale.ru/strik?utm_term=roper+refrigerator+ice+maker+leaking PDF link annotation
    • https://cdn.sqhk.co/bedepekemat/fxstrun/music_rocks_fairview_park.pdfIn PDF document text
    • http://mediaverifiedbadge.com/69198609436u1ojy.pdfIn PDF document text
    • http://ita-women.space/66015574989vsg1g.pdfIn PDF document text
    • http://organize.shop/warrior_cats_movie_trailer_2019ig1hs.pdfIn PDF document text
    • http://fb-pageunderreview.com/30323807240okjzg.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/hbLibie/glory_betting_tips_correct_score_vip_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/c2chfEk/lagaj.pdfIn PDF document text
    • http://fashion-deals.xyz/gogalezezutekeloxonota3vhmp.pdfIn PDF document text
    • http://perevozka.ru/the_lion_and_the_mouse_jerry_pinkney_summary7nxdk.pdfIn PDF document text
    • http://changepass.online/zupidezebenutijelero9f9x4.pdfIn PDF document text
    • http://padlamadla.site/hp_designjet_500_firmware_update_windows_10od7yz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_cdc398e6267444dab02397c0acf8181a.pdf?index=trueIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_61cf3681d74849759e054ed27f96478c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90485f07-1ca5-4da1-86a4-1eea3c86fdf8/xekisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43a27b2-5a91-4282-8bb8-8760e1884705/pidasiparidimarege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2089e9d6-d7eb-4174-81b2-18baf18678de/soundarya_lahari_meaning_and_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ddffba-8daf-4d8c-8528-9954a27f43c4/21235485540.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_off0000dee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE6 5228 bytes
SHA-256: f1deb6ecdc04f6e94950a98c6eca3559413a2b72697690518e39b3d6bcadfe31
font_01_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 10360 bytes
SHA-256: 047630a026786040f3c187a223f5d473d145d6e2adb89b82e0455332ccb3cd71

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