Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71426a8f0c29c9d…

MALICIOUS

PDF

84.7 KB Created: 2021-03-25 07:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b61cdfd2c248ec1b82bafb5a4b2e1b7 SHA-1: 986a4e181fd754629fe4ef1acde0feab91f1596c SHA-256: d71426a8f0c29c9d2119126fe46f31f1ab5adc26ce43c85e8515c4ebbf94d839
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 0.9995

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://botokaw.ru/123?utm_term=rumus+baxter+luka+bakar+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369168/normal_601f1046148d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_601da9325f63b.pdfIn PDF document text
    • http://tesodip.iblogger.org/saucony_women_s_everun_guide_iso.pdfIn PDF document text
    • http://podeves.xyz/batman_the_killing_joke_batman_and_batgirl_sceneg32k2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387421/normal_60040477c5501.pdfIn PDF document text
    • http://xabidewukolesas.66ghz.com/texas_online_driving_test_answers.pdfIn PDF document text
    • http://agentsoft.space/elphelt_guide_rev_2y0gqe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zizene/3748990223.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_edfa60d1e11a4199bd46f16a572489d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/netflix_limit_brl._22005.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/wuxawadipusegibulozewedur.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_d206a27a934643ff8e0062b32399d4b9.pdf?index=trueIn PDF document text
    • http://jadulurimuzita.rf.gd/multi_step_addition_and_subtraction_word_problems.pdfIn PDF document text
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_70bb1371315c4c3b9e207aa2eebbfec4.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_349ec836c5264cb78ee5e20ea4120ed9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabevog/73607716337.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/29727140644.pdfIn PDF document text
    • http://puwuruvawe.rf.gd/cloud_computing_pay_scale_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/rukiteduziruxe.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/92240172720.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 5084 bytes
SHA-256: 7d7a62b0b0e507f8683d3fe407d6105709febd6f982a8168bddec3215d0c36a1
font_01_sfnt_off0000f972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF972 12076 bytes
SHA-256: 9d47ecb18234e17cf2b3e4546a854f3d461a57f139e3c092290d1b9fb3b8f4aa
font_02_sfnt_off0001224f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_03_sfnt_off000136b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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