Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae877df50741e558…

MALICIOUS

PDF

92.3 KB Created: 2021-03-10 08:34:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 34496ef435ee9d0fc45dcd4650db69c0 SHA-1: b6f98916bdbf89757d90692adafb85dde42544ff SHA-256: ae877df50741e558187d7f74368ed0e0085f631ffd0e1f060b89768dce601244
186 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, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains references to 'Audio technica lp120xusb-bk', likely a lure to attract clicks to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://mezovuduw.ru/strik?utm_term=audio+technica+lp120xusb-bk PDF link annotation
    • http://logorag.22web.org/zedisitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_6017aa04e6ef4.pdfIn PDF document text
    • https://maninidepot.weebly.com/uploads/1/3/4/7/134702581/6365416.pdfIn PDF document text
    • https://sumikoxivabozo.weebly.com/uploads/1/3/3/9/133997645/xekoji_xopexero_lekolo.pdfIn PDF document text
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/zisobulexela.pdfIn PDF document text
    • https://wejafivikime.weebly.com/uploads/1/3/0/9/130969279/7431336.pdfIn PDF document text
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/nuvewazibalo.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/n3ECajc/jimmy_johns_sandwich_platter_nutrition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_601452cabeb4e.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/bpY7hgj/still_of_the_night_movie_plot_summary.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/3dd7b987d74f948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60135b59a71c2.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/mivuk-darorumixiv-finakezedo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_5ff0286ee12cc.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/u6Qjcnk/zedd_the_middle_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/f5lBahv/spy_camera_pen_online_shopping_flipkart.pdfIn PDF document text
    • https://xulexina.weebly.com/uploads/1/3/1/3/131398260/298857e8c12e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sozofini.epizy.com/59393689276.pdfIn PDF document text
    • http://benuzawawefe.epizy.com/gilel.pdfIn PDF document text
    • http://mejuton.epizy.com/last_of_the_mohicans_theme_song_remix.pdfIn PDF document text
    • http://betetedapunu.epizy.com/66905886127.pdfIn PDF document text
    • http://tegewixu.epizy.com/64893516790.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_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 6800 bytes
SHA-256: f52f259943e1bd4813bf8cd065cdaf26e4b75faec1acbe69fe24492f4917c9d1
font_01_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 5684 bytes
SHA-256: 59ce5e524806710171c504bfdcf9d59487759d789fc10fd36782f01923e23059
font_02_sfnt_off000118f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F3 2988 bytes
SHA-256: a39bd14b24e80b92862a0dd7defb1fbd0126223c6d9e6788056ba701f0578a25
font_03_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 11308 bytes
SHA-256: 97dd4f56c74771e8b5d8541f70f2ecfd4d3fc3f8d29405e507eb745cb10d4fcf
font_04_sfnt_off00014c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9D 16328 bytes
SHA-256: b5fbaaa4af9b36882f9d831a885ef238a37545ab26d417bac7d8f56cddfd7376

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