Malicious PDF — malware analysis report

Static analysis result for SHA-256 88beb1e172ec4928…

MALICIOUS

PDF

87.0 KB Created: 2021-04-02 10:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1e27a2053f45d900c98aac82867fc845 SHA-1: 3328847a2950110bb136b295a5d3c12bb0beb3c1 SHA-256: 88beb1e172ec49282fe5451f6917adc42575f99e0c109a4758565ce74a1a5099
156 Risk Score

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 0.9997

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 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://resalured.ru/strik?utm_term=how+to+remove+blades+from+husqvarna+riding+mower PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/giieibF/kipemufexatetafemi.pdfIn PDF document text
    • http://korecos.ru/allow_us_to_introduce_ourselves_meme_templatepfe70.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/7800361.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/jmhg6W0/weeds_cast_season_6_episode_3.pdfIn PDF document text
    • http://basvuruizleme.online/lalakizuzeguzomei30zo.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/65bfd37802.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/tajamuloka.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/cFibigc/niwutebake.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/fihMjdI/duddu_my_virtual_pet_hack.pdfIn PDF document text
    • http://hotsales-com.xyz/basketball_double_clutch_layupqn9ya.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jjfjeQX/did_the_floor_is_lava_host_died.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/gcVaiiA/50604295376.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokiwil/Fhehd8r/91893009255.pdfIn PDF document text
    • https://lufojujerap.weebly.com/uploads/1/3/4/4/134481619/8eab2f06255.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/nimuwet/bypass_frp_lock_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/46411183964.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/windows_8._1_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/44884301444.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/dolunororapizosavukim.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/farmall_super_a_engine_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/48665455565.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_off0001135d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135D 5700 bytes
SHA-256: d57217728ed75ef9acd1637e393d2b5be12c712c99ddc4113cf2188be6efd8bc
font_01_sfnt_off0001269d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269D 11200 bytes
SHA-256: 04856cf8738df098db47a94a0f9af7dda30719caff881664df2653cde17ef007

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