Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d105968bc44630…

MALICIOUS

PDF

104.4 KB Created: 2021-02-22 15:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0aaafbc217e7ca319bfd3c2d9140e9c5 SHA-1: 1d616a355d8689866d88e9aea44f9578859b92ff SHA-256: a6d105968bc44630df9d0096f62ddceb5bb763f3b40b9804516bf9bb81f64060
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 0.9996

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://jottigo.ru/123?utm_term=what+is+another+name+for+self-efficacy+theory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fd664d40e253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_602f476df35f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_5fddf5b47cddc.pdfIn PDF document text
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/marokeradalapegur.pdfIn PDF document text
    • http://uanews.website/xinabosawddzc1.pdfIn PDF document text
    • https://zezebeburopixem.weebly.com/uploads/1/3/5/3/135326834/xenukara-setifoxebafab-lawukokek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_60034418d7ad0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5fdeac49674e2.pdfIn PDF document text
    • http://badgesverified.com/tijupilojefokogegozakixir94z.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/types_of_bones_worksheet_answersu8bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485440/normal_601a7d5236967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_602a4336a8ec0.pdfIn PDF document text
    • http://latencfsrt.space/almanac_missouri_weather22squ.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_60222f267765e.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/ridip_xokoromezaxepe_nonozulojaris.pdfIn PDF document text
    • https://kofavuzaxo.weebly.com/uploads/1/3/0/8/130873868/3069989.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/xapidajovaji/animismo_e_espiritismo_ernesto_bozzano.pdfIn PDF document text
    • http://wepebafefik.rf.gd/bhola_bhandari_karke_nandi_ki_sawari.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/forklift_safety_quiz_answers_jj_keller.pdfIn PDF document text
    • http://ganusigesu.rf.gd/chordana_composer_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/view_archived_chats_on_whatsapp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/29700039536.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BD 5268 bytes
SHA-256: baf8a61ea68a604cc17883f344321dbbe9cdf92e3ecd5fe505791ced438250cb
font_01_sfnt_off00016b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B96 11384 bytes
SHA-256: c09514677de5916fdf7b3625fd511618b1f069ed9bfa8825494945c981527c5c

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