Malicious PDF — malware analysis report

Static analysis result for SHA-256 d487e621ab5e8cb5…

MALICIOUS

PDF

74.4 KB Created: 2021-03-02 16:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 60094ef3f4b2002cdfd1834bcfb76e70 SHA-1: 9f5659b9285fc86d0a24c740d84749c0e9778f50 SHA-256: d487e621ab5e8cb59fa0e50d1e01b30c0839c1e80846d7aca6bad98236876c1f
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate an attempt to redirect users to potentially harmful websites.

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://baarspo.ru/wix?keyword=sps+calendar+2019-20 PDF link annotation
    • http://reduslim-shop.website/when_should_i_turn_off_stability_controlhi0je.pdfIn PDF document text
    • http://goldstein.capital/what_is_indian_government_act_1935bh7hl.pdfIn PDF document text
    • http://kulinar2020.site/joziwoboruzevebexuyh7u.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/XNhdO0i/31865082609.pdfIn PDF document text
    • http://nout-prokat.website/lucky_life_game_poki74wpj.pdfIn PDF document text
    • http://babbieshop.ru/how_to_reset_medialink_routerlx1ov.pdfIn PDF document text
    • http://naturagrush.space/57116461727cwad6.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/5Xighdi/tyco_slot_car_race_track_sets.pdfIn PDF document text
    • http://myfavoritesun.xyz/rugomams9yih.pdfIn PDF document text
    • http://buzovanukoziba.22web.org/comparing_decimals_practice_worksheet.pdfIn PDF document text
    • http://borezopesane.22web.org/93093255299.pdfIn PDF document text
    • http://iceteas.space/86679650568miucw.pdfIn PDF document text
    • http://shlifovka-pol.website/jemufok72z51.pdfIn PDF document text
    • http://todayit.pro/my_little_princess_2011_full_movie_englishyjam5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lidikulogape.rf.gd/french_revolution_textbook.pdfIn PDF document text
    • http://boxitevu.rf.gd/palubapit.pdfIn PDF document text
    • http://dexixikix.epizy.com/87030656323.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 5684 bytes
SHA-256: c57e275849da8820d0ebab9d95924239406254c8968a8b7fe185fd33a904e9fc
font_01_sfnt_off0000f92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92D 10380 bytes
SHA-256: 848c00f60d88c01719b4f50db84b042c1ee32497cdfcc379cf512a61c6d9b067

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