Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a48318119edfdb…

MALICIOUS

PDF

87.2 KB Created: 2021-09-20 02:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b2831a9050259f984421c9051ca4651a SHA-1: 43fa184d70d4382d9edfa55458100c8d160e33e9 SHA-256: e2a48318119edfdb7525dee16c00ad380c68dd3104f45ee26160b477cf3038ae
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to a domain flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not directly executable in this context, points towards potential exploitation vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://laborke.ru/uplcv?utm_term=best+pc+games+for+android+download PDF link annotation
    • http://c2ctrading.org/cms_upload/files/filabapenapopivipapuvewuv.pdfIn PDF document text
    • https://novsport.com/content/File/89673614876.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/8803377564.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/rowoposewefitefirulevexi.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/25104885027.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/33334310176.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f997345af---58539171449.pdfIn PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/lojujaxuxofumaxoved.pdfIn PDF document text
    • http://kccmaul.com/files/files/degepejowixamejuxatil.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/kiruligozupopajede.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/81521874560.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/zadowelabefe.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/vajoredudop.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/75486587719.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/vimedujixotefiwo.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/23749310205.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/midomafanaxaweraxuvezaj.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/c8c0f0c085598bb3abc781e7119914ba/85895900719.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/7252901891.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/nadimosulufuv.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/gazitegogazudizepate.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210902081226_1634030887.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/jezulu.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/mujijagunakelifipeg.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210920082555.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/ranogirevalizuf.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 11100 bytes
SHA-256: 5d24166b6cf41bde233d71978ad0be9c0360aac3f54a61f9f8bf859707feb2dc
font_01_sfnt_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF9 18204 bytes
SHA-256: 0d8325b894255e6029937aa231f8e4a3cecbec57d99a207ae3f44db95ff4185c