Malicious PDF — malware analysis report

Static analysis result for SHA-256 d943420157daf7e4…

MALICIOUS

PDF

81.2 KB Created: 2021-03-14 05:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5662d22beb92ef6ba0abc4eaa85bd61b SHA-1: cd403fcd4bae4cfff69b12fe55ebe4d8c8eb6625 SHA-256: d943420157daf7e499a73cf2f1189656de0928902f7a616a76d46484b3b6a7ac
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely serve as lures to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://mezovuduw.ru/award?keyword=economist+may+2020+pdf PDF link annotation
    • http://logvoz.ru/massachusetts_rmv_accident_reportjvl0y.pdfIn PDF document text
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/e7e814bf77.pdfIn PDF document text
    • http://idealica-italiaoficial.site/zopumagijaxijek02v7q.pdfIn PDF document text
    • http://load-bcp.com/53882778427ok6tl.pdfIn PDF document text
    • https://xudarusutovupaf.weebly.com/uploads/1/3/0/8/130814591/2881715.pdfIn PDF document text
    • http://setifol.66ghz.com/rofupofokewuforuvof.pdfIn PDF document text
    • https://bezigetomesijag.weebly.com/uploads/1/3/1/0/131070469/80be096e9b8596.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/nutadugumigebitat.pdfIn PDF document text
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/daduzipisizimuki.pdfIn PDF document text
    • http://storeplus.pro/is_rumpelstiltskin_based_on_a_true_story5f7u3.pdfIn PDF document text
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/9778315.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/959945.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/minupe.pdfIn PDF document text
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/fodugow_gatetu_belijiluwezux_nutisiwukimeziz.pdfIn PDF document text
    • https://fafofezun.weebly.com/uploads/1/3/4/3/134338513/1444211.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/nuxaguvaxululumovupu.pdfIn PDF document text
    • http://gufutaca6.xyz/107220696110wdp6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzunop.rf.gd/apoorva_sagodharargal_video_song_hd.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/66972711672.pdfIn PDF document text
    • http://xojesenokok.epizy.com/43137607167.pdfIn PDF document text
    • http://gavenivifi.rf.gd/halloween_pumpkin_template_printable.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_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 5508 bytes
SHA-256: 51df7ff90c29d3270616b991100bbe11f42b929b8134fbf2672deef99910e441
font_01_sfnt_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 11172 bytes
SHA-256: 36933f41a107c65fe186d4c96e540891262de135912d666348c805f3c73e4f2b

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