Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4823895e70b3105…

MALICIOUS

PDF

86.5 KB Created: 2021-02-28 15:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 48141232d04d24eeea98b49d181a7e7b SHA-1: bd28f668b4720c914e0bd4c19d51f7b64a6007db SHA-256: a4823895e70b3105613cc2c804a35c937a9d7854dc62d4e532d96e6227c946b1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document utilizes a link farm strategy, embedding numerous URLs pointing to disposable hosting, with a specific lure related to a 'bright line eating plan pdf'. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://fokemale.ru/123?utm_term=bright+line+eating+plan+pdf PDF link annotation
    • http://pesale.pro/51698864716c4k5h.pdfIn PDF document text
    • http://effektzhizni.ru/61103254798tyuyq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff0e140107e9.pdfIn PDF document text
    • http://alluniversity.fun/bigfm_radio_frequenz_stuttgart7i2rg.pdfIn PDF document text
    • https://cdn.sqhk.co/baradudapati/Jigic9O/zupom.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/dJhi70v/25377846808.pdfIn PDF document text
    • https://cdn.sqhk.co/paxelababeg/NYhchfz/lego_batman_beyond_gotham_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/Gcjdgct/27759978228.pdfIn PDF document text
    • http://libertinemodels.com/92038869035xijut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_5fdb17b670928.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/F7Xiejj/67289947123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_6010342910b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499651/normal_5fd2a8b783e41.pdfIn PDF document text
    • https://cdn.sqhk.co/labokezugumu/jbhjfKH/8695932385.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/hcF6Xg5/pumigerisevusefup.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/jebupofedijakuk/south_movie_actress_hd_wallpaper.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/vulepubadulonuvepuwuf.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/bubirijeberodu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 5176 bytes
SHA-256: 389ef2bcf4939e91ecb8618d8c88e7665bebfbb8c92c3cad0d6b52aba304513f
font_01_sfnt_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0001289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 10440 bytes
SHA-256: 52b4da311f2b1e9f6a476f76cb23a76c2cd012de3816cc20a88a40dcb34b806c

Open this report in the interactive analyzer, or submit your own file for analysis.