Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0753ab2713b7a94…

MALICIOUS

PDF

156.6 KB Created: 2021-02-15 18:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3df71183e693ec38f1b55b5ab64b42bd SHA-1: b573c062cee823a0fadc42458000ccef19947a4f SHA-256: b0753ab2713b7a947bd0badb14e163cdec1b8d7fdd67a1f62a6aabebbb2c6cda
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document contains numerous external links, many hosted on disposable domains and Weebly, forming a link farm. The presence of urgency language suggests a lure to encourage immediate clicks on these malicious links. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely leading to a phishing page or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/wb?keyword=what%20is%20the%20story%20of%20wicked%20witch PDF link annotation
    • https://cdn.sqhk.co/kebisozakola/bxLeOgh/joporadasimipevo.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/jChal0a/dirixol.pdfIn PDF document text
    • https://dedelazixuni.weebly.com/uploads/1/3/4/5/134596723/lumeriko-kakak-mubigetob-gusefadef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403672/normal_60075228edf1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_600c9ae423079.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/eajbkhd/gujiwupozukavizato.pdfIn PDF document text
    • https://gefaturulabi.weebly.com/uploads/1/3/4/4/134487578/f6644e2.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ijhb30N/video_call_recorder_for_whatsapp_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/mlghvon/stone_garden_statues_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/1LqzIov/73574983608.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/ihidHif/dragon_warrior_nes_price.pdfIn PDF document text
    • https://nezuwiwobitedut.weebly.com/uploads/1/3/4/6/134600585/7424027.pdfIn PDF document text
    • https://bupogoduvokog.weebly.com/uploads/1/3/4/6/134690502/xodokel.pdfIn PDF document text
    • https://cdn.sqhk.co/wevosevob/ijfha1y/mijapokezuremikukasobi.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/bsifibO/skyblock_addons_download_1._16._1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pajamubo.rf.gd/jquery_ajax_form_submit_post_example.pdfIn PDF document text
    • http://xupevovegizem.rf.gd/canon_pixma_ip110_setup.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/61247607116.pdfIn PDF document text
    • http://zusamab.epizy.com/ak_singer_hd_image.pdfIn PDF document text
    • http://fekerudosepu.rf.gd/pulolepavekubazukas.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E983 12576 bytes
SHA-256: c4e8666a0f158e00144a77f2f20988c34e47dd6050813a99446501b18c47d7d7
font_01_sfnt_off000212e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x212E2 5348 bytes
SHA-256: 505927b7c2c5c30878223f1461129934ac53ff138187e09335b0af26802e0160
font_02_sfnt_off0002252c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2252C 13144 bytes
SHA-256: 03a13b73319803efadcb89d532f6e8049d0fed4221b3729e723694f7897f2326
font_03_sfnt_off00024f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F14 16120 bytes
SHA-256: 2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e