Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68c9d4e70a6468d…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 17:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b20e48920ba65dac7f211fb7e9ffa8a7 SHA-1: 870657d643c13ec8c42ee6687c11898ad65082a0 SHA-256: b68c9d4e70a6468d5d1bf16630a56cae55f5417837b39c3d4bfecbe6769b7ded
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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 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://jottigo.ru/strik?utm_term=phase+changes+of+matter+worksheet+for+grade+3 PDF link annotation
    • https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/7274748.pdfIn PDF document text
    • https://zolivapodi.weebly.com/uploads/1/3/5/3/135313307/zilumolofujubulaz.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/29387733365.pdfIn PDF document text
    • http://kenaxifinot.22web.org/christie_cancer_information_centre.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/3276393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_601e567c7a2dd.pdfIn PDF document text
    • http://mimowetoxizov.22web.org/apptoko_gta_san_andreas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_5fc6d07e6f985.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/siwubutisawazorakexapad.pdfIn PDF document text
    • https://mosevulex.weebly.com/uploads/1/3/4/8/134860143/7d6aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fe75a16db79e.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/51715965225.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/tudikogifal.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/sefabe/88545644784.pdfIn PDF document text
    • http://sokutuwinal.epizy.com/bruchrechnung_multiplikation_aufgaben.pdfIn PDF document text
    • http://bapatan.rf.gd/35240980528.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/opodo_contact_form.pdfIn PDF document text
    • http://relaweki.rf.gd/108_amman_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/melhores_musicas_chiclete_com_banana.pdfIn PDF document text
    • http://bibosisiv.epizy.com/66371688415.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/59647087337.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/lidalobofafisuxeluli.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 5464 bytes
SHA-256: 58a41185f437c09ae5f2bb941d18b89c60644c462dd8ecc3ca5ffb4f44774983
font_01_sfnt_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 10032 bytes
SHA-256: 7fbace3c549001762ce7efa0fb3cee1c9449cdb7edbd77a151ab1ab6f97852fa
font_02_sfnt_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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