Malicious PDF — malware analysis report

Static analysis result for SHA-256 977e51c0e7838494…

MALICIOUS

PDF

83.5 KB Created: 2021-03-19 14:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 10ecd6f72047ecea37e2e8a4ec07b725 SHA-1: 9e818deea6b7539407a8e60d43c286648e7822ce SHA-256: 977e51c0e78384945450ff9568d7a6b4b8d8f17410a355eca25c084def9fc9d3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/strik?utm_term=what+size+bolts+for+samsung+tv PDF link annotation
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/8960c2b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5fe2c1753d86c.pdfIn PDF document text
    • http://wefinexof.iblogger.org/n_a_t_p_ka_full_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5ffba34072a3f.pdfIn PDF document text
    • http://mogurasubep.22web.org/zubenezitiviteluwulogil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496607/normal_5fe55ffd54fbe.pdfIn PDF document text
    • https://tunilawogipafex.weebly.com/uploads/1/3/2/8/132814387/dibularowi.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/zatezetakenim.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/8383881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5fe242333f246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_6012bb23500f3.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/gusule/kepoluvejiregowowawa.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/carers_allowance_scotland_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/nojaririvulojomijomiki.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/twitch_prime_pack_3.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/kenmore_top_load_high_efficiency_washer_wont_spin.pdfIn PDF document text
    • http://zawozunilutufu.rf.gd/what_does_the_climate_of_an_area_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/seeri_varum_kaalai_songs_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/84234318137.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/6321851921.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/33449903546.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_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 5444 bytes
SHA-256: c11d754166d3b2d1ca0fce9124eaf1827ad37979ef3650ed94b095ebb667cdf5
font_01_sfnt_off000118fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FD 11088 bytes
SHA-256: 4d35037a55a0f62aa7966a5abddf93bd04ff8a1c236e6764e1e3b59849f8c4ce

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