Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d2c00099c7828b…

MALICIOUS

PDF

75.5 KB Created: 2021-05-18 23:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b001971d7834f22bf944cfd2b5655126 SHA-1: 2fe4418cfda7cbb699ed4653443cb8beb3cb0136 SHA-256: 96d2c00099c7828b1b6c203c8c01d1efab3961ca6ebff3545d059cdb3d83b479
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The primary malicious URL identified is 'https://resalured.ru/strik?utm_term=meijer+1350+w+lake+lansing+rd+east+lansing+mi+48823'. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely for distributing further payloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=meijer+1350+w+lake+lansing+rd+east+lansing+mi+48823
    • http://fowirunuwajuk.iblogger.org/sexam.pdf
    • https://static.s123-cdn-static.com/uploads/4502563/normal_5ffc1f1c4e959.pdf
    • https://cdn-cms.f-static.net/uploads/4383922/normal_6034cad4af304.pdf
    • https://runolenasugu.weebly.com/uploads/1/3/4/7/134765044/847599.pdf
    • https://doxibizogo.weebly.com/uploads/1/3/4/8/134893922/xufaredotuzufasu.pdf
    • https://cdn-cms.f-static.net/uploads/4470828/normal_605a3626754ad.pdf
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/aeb006a178a153.pdf
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/97da647af0871.pdf
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/ralik-xezemipigafanep-nogukodu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/veledabejufi/classes_of_animals_worksheet.pdf
    • https://s3.amazonaws.com/fopalew/why_is_my_belkin_wireless_charger_blinking_red.pdf
    • https://s3.amazonaws.com/mosezavor/95_theses_martin_luther_modern_english.pdf
    • https://uploads.strikinglycdn.com/files/2fa4f76b-398c-491f-a01a-27319df27511/xefozo.pdf
    • https://s3.amazonaws.com/wamatasamegu/kidde_nighthawk_carbon_monoxide_detector_chirping.pdf
    • https://s3.amazonaws.com/nodetuxapabara/55463919307.pdf
    • http://xegubidutanaza.epizy.com/bolezofajogefejereb.pdf
    • https://uploads.strikinglycdn.com/files/d9801bb2-e4f3-41a4-a2b8-dc530f51e606/sidivevokibogu.pdf
    • http://masekafisixovok.epizy.com/fijajojak.pdf
    • https://s3.amazonaws.com/senodiw/75143552400.pdf
    • https://s3.amazonaws.com/ruzumeb/fapuretilata.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/identifying_adjectives_worksheet_for_grade_1.pdf
    • https://uploads.strikinglycdn.com/files/00b211dd-00a1-423b-93cd-d9583af55968/how_to_disassemble_whirlpool_cabrio_washer.pdf
    • https://s3.amazonaws.com/tikoweravisixu/bodyguard_2012_telugu_full_movie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ef.bin
3aa70a49be5c99f8eb94a8a2ef425a2a53cbcef69259db5d04330c45c3033dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 6276 bytes
font_01_sfnt_off0000f95a.bin
15b72fa405afca75bf754e9a59b05412a7dcc9fdfa3dc3f3221dd39fd32acddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 11668 bytes

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