Malicious PDF — malware analysis report

Static analysis result for SHA-256 358a1bd1b37a1ae3…

MALICIOUS

PDF

82.8 KB Created: 2021-03-01 07:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0cd99eccd3b35be981cacfa45d0a073e SHA-1: 0844d03d5921c7dbe2808af031880bf9566cbabf SHA-256: 358a1bd1b37a1ae386fb1412669ab72b5a78dca496a714c3f7544f7c99066b71
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One prominent URL, 'https://baarspo.ru/award?keyword=spirit+of+laws+1748', is flagged as a high-risk redirector, suggesting it leads to malicious content. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0', reinforcing the malicious nature. The ML classifier output of 0.999206 further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=spirit+of+laws+1748 PDF link annotation
    • https://cdn.sqhk.co/xufojidaju/iiTijch/88354887306.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/can_you_connect_ps4_gold_headset_to_phone.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/ad0a4eca6.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/986453.pdfIn PDF document text
    • https://kelurefuvaw.weebly.com/uploads/1/3/0/9/130969237/redonenamimududeximi.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/Zjdhjjj/quick_views_free_views_boosters.pdfIn PDF document text
    • https://nozugaxuxanukuj.weebly.com/uploads/1/3/0/8/130813784/9488497.pdfIn PDF document text
    • https://fomimixa.weebly.com/uploads/1/3/4/7/134775862/3831483.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/vjigiia/is_there_any_free_call_recorder_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/giicgjd/home_painting_cost_estimator.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/31515002209.pdfIn PDF document text
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/simusaxipezofarusig.pdfIn PDF document text
    • https://xizirasifeda.weebly.com/uploads/1/3/4/3/134344010/7109560.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/eb4d205ac01.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/nelizenejakarug/wonder_woman_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/fitafijisebedo.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/academic_performance_research_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/antigone_character_analysis.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/what_size_suitcase_is_good_for_carry_on.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/lunitevorupobawanoju.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/dilatuzetixu.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/hanuman_cartoon_hd_images.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/negefikaxinesovetemerun.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/gepapejufapijilu.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_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 5504 bytes
SHA-256: 33872270d57385b0906892be2f89183e8eb3e8a92374e943fbffbeae11c8f6bc
font_01_sfnt_off00011b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B04 10192 bytes
SHA-256: f6d97bc4a7c8f2c588622ff6d44a7ce60ce1e27d5c326914014d81bb29e2c4c7