Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3febb4943ab2ee2…

MALICIOUS

PDF

37.1 KB Created: 2020-04-15 23:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2021-08-25
MD5: 5fcb1d99639a711462b3774ff6e9802a SHA-1: dc52fdfa579fd5aba55fbd8b32f6678f3c49c6b0 SHA-256: a3febb4943ab2ee259cb20aae8493ef12d3b1d4ad0c1cab1b688e787301f6ec8
136 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, a technique often used to host malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to an Android SDK license, suggesting a social engineering pretext. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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 http://nsvtransport.com/uploads/1/3/0/4/130483393/130483393.html#android+sdk+platform+27+accept+license PDF link annotation
    • http://badalicebebad.com/uploads/1/3/0/9/130969488/0b576.pdfIn PDF document text
    • http://properpropertysolutions.com/uploads/1/3/0/2/130292098/riburixoje-wanipaziz-wenonader.pdfIn PDF document text
    • http://fiveminutememories.com/uploads/1/3/0/7/130775722/suwapakeweg_memigovusob_pumerulipifev.pdfIn PDF document text
    • http://doorandwindowplus.com/uploads/1/3/0/6/130639123/9525496.pdfIn PDF document text
    • http://magnutech.com/uploads/1/3/0/7/130739682/nagadufirigod.pdfIn PDF document text
    • http://hopectrnj.org/uploads/1/3/0/9/130969090/2302082.pdfIn PDF document text
    • http://altitudenursingservices.com/uploads/1/3/0/8/130874305/valoware_kekigeneluzo_kulekexiso.pdfIn PDF document text
    • http://mattrosaaeneducationleadership.com/uploads/1/3/0/9/130969543/xujage_nasefa.pdfIn PDF document text
    • http://riveroflifergv.com/uploads/1/3/0/8/130814186/310911.pdfIn PDF document text
    • http://greatdynasty.net/uploads/1/3/0/5/130541600/tewabitaruna.pdfIn PDF document text
    • http://happybirthdayalivia.com/uploads/1/3/0/4/130483067/bilakod-zasavilosu-saribonidobubu-zaxigaku.pdfIn PDF document text
    • http://assisisnewwine.info/uploads/1/3/0/5/130538923/jiwarum-fowelokive-gikipubo.pdfIn PDF document text
    • http://drewwieland.com/uploads/1/3/0/4/130488220/1b82f044e1b4091.pdfIn PDF document text
    • http://source.0.4In PDF document text
    • https://issuetrackerIn 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F2 7676 bytes
SHA-256: c73c88a9c2ff9d3958f311c8b99a381009906525d54920f61265066fff0cd9d3

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