Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fc9f152c953f86…

MALICIOUS

PDF

79.2 KB Created: 2021-03-08 16:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ab1aac0bc9d30b3b7f5ae30262cb0a97 SHA-1: 2df64ce7fdefef81bcecf744ad1d858d8bd35a1d SHA-256: e2fc9f152c953f8653bc977b92dd59bcdb4d83a46550016c1fbe624a6e7589dc
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 0.9998

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://bologen.ru/123?utm_term=a+thirsty+crow+story+in+english+pdf PDF link annotation
    • http://idealicaitalia-official.site/what_penny_stock_to_buy_right_nowkbt0m.pdfIn PDF document text
    • http://nibelv.xyz/90020583995lcbao.pdfIn PDF document text
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/45238.pdfIn PDF document text
    • http://wunuxuvi.sportsontheweb.net/finuvarovuvasorefamowa.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/7543657.pdfIn PDF document text
    • https://mevuponepom.weebly.com/uploads/1/3/4/8/134899748/405d86cf23c.pdfIn PDF document text
    • http://romeita.fun/paper_toss_boss_onlinehlfhh.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/gmq2RWV/mayavi_malayalam_cartoon_video_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499660/normal_6032f0d48e8dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_6009c943ad599.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/ravpower_usb_adapter.pdfIn PDF document text
    • https://palepolute.weebly.com/uploads/1/3/5/9/135963306/vajuralobirefagere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450746/normal_5ff1e33e6a73c.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/nejitubarul-simaxakuzanize-wodelijemoti-kifixonifija.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/jfi1iji/what_s_the_picture_guess_pick_up_lines.pdfIn PDF document text
    • http://trysoda.pro/generate_responsive_email_templatepysbn.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/sezipizorerilegewe8qxnq.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
    • http://bufijonewufo.onlinewebshop.net/30118089701.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_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5176 bytes
SHA-256: 41e466917d402695ffe9a841653ec8ccce83b5ee9328807c16c18400fd4d1ac5
font_01_sfnt_off0000fd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD56 10620 bytes
SHA-256: 7d4819718261518e03dadf544b5c6368667c9ad4b7f66eba0a63ca51dfa4b261
font_02_sfnt_off0001213c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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