Malicious PDF — malware analysis report

Static analysis result for SHA-256 03870894c303769a…

MALICIOUS

PDF

81.0 KB Created: 2021-05-08 20:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30ccca006f61a185011aa1f0bed30c46 SHA-1: daa47e029a9813a53d76e8a607cf8b5a7badae5f SHA-256: 03870894c303769afb46d06665bf5067c1eded7bda970dbc6c398032d9968e38
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://pelibifir.ru/strik?utm_term=movie+maker+live+2012+free+download PDF link annotation
    • https://cdn.sqhk.co/golomamone/gjkRgev/20373601951.pdfIn PDF document text
    • http://chelamela.org/winorifotixelapefapikg4msw.pdfIn PDF document text
    • http://instapriz365.site/mojexitonimaluvoxetop478tw.pdfIn PDF document text
    • http://habirovradik.ru/5940367605896qh3.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/ibngd4O/loop_diuretics_side_effects_of_calcium.pdfIn PDF document text
    • http://gofimowekes.66ghz.com/asos_missguided_high_neck_bikini_top.pdfIn PDF document text
    • http://usesalle.xyz/what_do_the_numbers_222_and_555_meanvk12b.pdfIn PDF document text
    • http://rowokalasi.iblogger.org/80123835383.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tewidunutazi.rf.gd/android_box_argos.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_3507ae7b4c58416f96b2c5daee229186.pdf?index=trueIn PDF document text
    • http://fanedabomo.epizy.com/what_does_critically_examine_mean_in_an_essay.pdfIn PDF document text
    • http://tadipakajare.rf.gd/4471289783.pdfIn PDF document text
    • http://lujovaku.epizy.com/utility_software_definition.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_9d692b05f0354f8d857a334d8761a6d1.pdf?index=trueIn PDF document text
    • http://jumebesatupa.epizy.com/25745688812.pdfIn PDF document text
    • http://luvopekun.epizy.com/hp_elitebook_8570p_price.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_102231aba18c41f592fc5e824c6c28f7.pdf?index=trueIn 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_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 5424 bytes
SHA-256: c0cb8ed295691f1d6a92668f215bd50ef00954f9db9a6ce3355cf74f914ed9e8
font_01_sfnt_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 10392 bytes
SHA-256: 9aa5114060e8cbf044f475253ac8e6f340a7ff0fd642c3300a60504adc173c0d

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