Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4a40c8744bf110…

MALICIOUS

PDF

86.1 KB Created: 2021-01-24 12:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ba9628f1be7de3f18607597602a2560a SHA-1: 05150416ff0c71e433d66f43183681c53ef07005 SHA-256: 0f4a40c8744bf1106e0b412dcc275373183fd013af30b50d0d7bcdd3674be578
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user clicks for malicious purposes.

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://traffine.ru/aws?utm_term=lightroom+mod+apk+presets PDF link annotation
    • https://wopenugepaned.weebly.com/uploads/1/3/1/0/131069893/kafimab-ragifivufasumeg.pdfIn PDF document text
    • https://pavenepono.weebly.com/uploads/1/3/1/3/131383439/rivodusuzeworisunon.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/beloxosamaka.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/jdgflnJ/papa_s_pizzeria_cooking_games_unblocked.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/zogadutelatu-kemewakozimod-jovapuma-vurijovovemikox.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/L4y5jie/zuwan.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/iadieJd/fososatagudoket.pdfIn PDF document text
    • http://all-host.site/amapiano_beat_maker_2_apk_download6v6sn.pdfIn PDF document text
    • http://edapog.online/uefa_champions_league_semi_final_2020_highlightsfye32.pdfIn PDF document text
    • http://lenudes.com/minecraft_exploration_mods_1._12._2650di.pdfIn PDF document text
    • http://okrasote.info/my_city_church_boyne_islandg6wtj.pdfIn PDF document text
    • http://simcars.ru/66425353761v3ckb.pdfIn PDF document text
    • http://qwert-ita.fun/kugituwugulijaxabanemogowtusp.pdfIn PDF document text
    • http://zoosalon.org/liledifakazeqr5yc.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/pewibim/3rd_party_transformers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/95782206858.pdfIn PDF document text
    • http://femejedad.epizy.com/2125834252.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/chanel_slingback_shoes_size_guide.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000f311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF311 5344 bytes
SHA-256: 1c55436396309a3df3aa4f17c89899e28ee63c27c398d3e428994dc05b2091e8
font_02_sfnt_off0001050a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050A 3076 bytes
SHA-256: 01ac97522e5334f6fd6297e8abf360252d11f500d307fd20cdfa315eb4739047
font_03_sfnt_off00011218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11218 9516 bytes
SHA-256: 888a45c64eecadb6743d286ebb4f46067054e97266d9fd3d6abe8419cb56ed80
font_04_sfnt_off000132e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E3 16716 bytes
SHA-256: 5c7efdc7c545f30a590b6aa07a86802e18aab44fc920a6c5512e86551fde1405

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