Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19acf17161fb574…

MALICIOUS

PDF

96.9 KB Created: 2021-02-14 16:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 204f0cbc68655854ea8003abeeb30d3d SHA-1: 769907ca34a424c7df7c452b07385c0ba391971b SHA-256: e19acf17161fb5749e98629ecd473b17e31dbd9808d65a22e129ac6977ad65f9
186 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The embedded URL `https://baarspo.ru/123?utm_term=the+sims+mobile+cheats+2020+ios` suggests a lure related to game cheats, likely to redirect users to phishing or scam pages. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/123?utm_term=the+sims+mobile+cheats+2020+ios PDF link annotation
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/mezetakepelama.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/ZRggExR/90008755662.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/90gcWje/baby_boy_skin_for_virtual_baby_shower.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/js99MCZ/world_at_war_zombie_maps_ps3_free_download.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/kofonojodozokokuxav.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/ctrjcrM/67005640669.pdfIn PDF document text
    • https://jixerunoxeza.weebly.com/uploads/1/3/4/6/134678785/bozonubew-guzufaputejebut-tukowedowefabek-sofosagisivemat.pdfIn PDF document text
    • https://tuwubave.weebly.com/uploads/1/3/3/9/133997869/b18f6a.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/9656831.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/gatidabifa.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/VxhfGjd/super_jupper_jungle_world_level_80.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/8466192.pdfIn PDF document text
    • https://fabirakarag.weebly.com/uploads/1/3/2/7/132710689/losozonipumaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://womepulus.epizy.com/ms_word_user_manual_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/xslt_template_copy_all.pdfIn PDF document text
    • http://tanasebebibe.epizy.com/62990566538.pdfIn PDF document text
    • http://jetubomubiko.epizy.com/sazatokebajafokizad.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/chhota_bheem_video_tinyjuke_net.pdfIn PDF document text
    • http://fonajuwowo.epizy.com/41711859727.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/rimworld_ice_sheet_raids.pdfIn PDF document text
    • http://xefavab.rf.gd/xazitinetelotaxezot.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/zimizizo.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 9060 bytes
SHA-256: 45ab14b752cf0036cb215d3fab18f60aecae51ab6593bfc9d8b8f791ef4e74a2
font_01_sfnt_off00010970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10970 5304 bytes
SHA-256: fd275a3212278430a5190c32831439c5fcdafa0c7fbff041dcc7aa7efcf2ccf9
font_02_sfnt_off00011b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B49 5848 bytes
SHA-256: ac47351a9579e882373e45cfde8a5231cad92d3d2bd3f74079a30413014a24e0
font_03_sfnt_off00012a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0C 16132 bytes
SHA-256: 1fd7f2092de91789ea9ce91c5adddf5414caf225df279ba49f928e45092b9f68
font_04_sfnt_off00015adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADC 16944 bytes
SHA-256: f004b4ea186e6fa6a3a0f399f7fff476bffae9e8cc6b5049a04fe3cb3d473c47